Disclaimer: This is obviously just my opinion. I do not expected everyone to agree or disagree with me, but I am curious as to how many people have similar feelings towards certain aspects.
It is entirely possible that some of the things that I mention are merely bugs in the Beta version of the game and not necessarily in the release.
I've spent the majority of the time that the Early Access Beta has been available, playing it and have an extremely large amount of playtime across multiple ARPGs (Incuding All Diablo games and of course, PoE), so any negative points are with the intention of improving the logevity of the game, not just to trash on the game.

I have a large collection of data from the Beta, some of which will be included in this post, this isn't complete and will be finalised in the next Beta weekend. I simply didn't have the time to play that much and also complete this data set.

My Beta progression

Positive Points

Rather than immediately going into the negative aspects and/or concerns that I have from the Beta, I'll start with the more positive aspects.
In-Game Visuals (Highest settings almost all round)
The game looks visually stunning. It's easily one of, if not the best looking ARPG that I have played to date. The environments in Fractured Peaks are well detailed with a fairly wide colour palette, whilst still maintaining that darker feel without feeling like the colours are washed out.

• This was further emphasized whilst going through all the side content and entering all the different Aspect Dungeons, where there were clear themes and differences in certain environments.

Skills
Overall, skill generally feel nice to use, especially on the Barbarian and Rogue. There are a lot of visually cool skills (Several Rogue skills, a few Sorceress skills and Ultimate Skills) and a lot of skills that feel impactful in play such as Upheaval (Barbarian).
Open World
Considering that we only have access to the Fractured Peaks region, the world already feels quite big. There's a lot of exploration within Fractured Peaks itself that kept me busy for quite a decent amount of time exploring everything (It appears that there are some quests and one dungeon unvailable in the beta? At least there were areas that I know quests exist in but simply couldn't do).
If the remaining Regions match the size and level of exploration as Fractured Peaks, then I'll be extremely happy with the amount of side content available (I don't feel there should be much more than this, as like any ARPG the game should be based around Endgame, not side content and too much side content takes away from other aspects if they continue to be as rewarding as Renown is - Paragon and Skill points).
Overall completion of Fractured Peaks in the Beta
Questing and Event details for the Beta (Incomplete and subject to change)
Enemy Variety
From some of the posts I have seen, I'm not sure that everyone will necessarily agree with this one, however, I felt like for simply being a single Region, there was a very large amount of different enemy types.

• So far I have 99 enemy types (Of course some models and monster types are repeated and simply given a slight variation). Some are my best guess as to their types, these are not confirmed damage types.

Current Data Set for enemies in the Fractured Peaks (Incomplete and subject to change)
Bosses
This part is specifically referring to the Act bosses and World boss, not the dungeon bosses that will be covered in a more negative light, unfortunately.
The Act bosses felt great. All the bosses felt like there was a little bit of mechanical thought required, rather than just mindlessly attacking away without any risk associated with them at all. Yes, they are simple mechanics, but still had the need for some thought as to what is happening during a phase. Lilith's Lament feeling the best for me personally from the Act Bosses, followed by Tchorch and X'Fal.
Ashava was a fun world boss, which rewards you for learning the attacks and being able to avoid them. The scaling on the poison damage specifically felt a bit off compared to everything else in the Beta, but that's easily overcome by avoiding the attack.
Class Identity
This is referring to the Combo System, Arsenal System and Enchanting system. Honestly all of these felt quite good in their own way. I think it's too early in the game to be making judgements about how strong they are or how one plays over another in the endgame, but all systems felt enjoyable to engage with in different ways.
I do think that, whilst Barbarian and Rogue's systems were enjoyable, Sorceress feels like it's the best of the three systems, simply because it opens up more build variety that the others somewhat lack. This might make build variation later feel a little bit lacking in other classes, or it might not make any difference, remains to be seen on release.

This is pretty much where I will end the positive notes. There are other smaller things that don't necessarily fit into a category and just take up a lot of space for relatively little impact.

Negative Points

Unfortunately, we reach the point where things weren't so great and simply due to the nature of them being more negative, they will be more detailed in certain areas.
Skills / Skill Usage
On the flip side of the above comments about Skills, the main negative I have is that none of the skills felt particularly impactful. There was no "oomph" or impact behing a large majority of the skills.

• Barbarian didn't have much weight behind its skills, neither didn't Sorceress.
• Surprisingly, Rogue felt like it had the most behind its skills as at least the movement that it provided felt like you could make some good combinations with the skills (Dashing into Evading into Caltrops etc).

In regards to Skill Usage itself, it felt a bit clunky with certain attacks and I could really feel the console aspect of the game behind the way that targetting on skill usage and general flow of skill usage feels.

• This is very much a point that I think PoE does so much better than almost any ARPG in existence and that is having the ability to set individual skills to use without moving.
  • Yes, Diablo IV has Force Stand... yes, this is a very good thing. However, why is there no option to tie this and a skill usage together like PoE?! Surely at this point, this should be almost a standard if anything. It simply makes the flow of skill usage feel better, rather than having to push a Force Stand binding and a skill
• This is further emphasised when the mob density increases, as the game seems to struggle to determine which target you want to go for with several targets moving in quick succession. This feels like it's going to be an even bigger problem later on.

I honestly expected a bit more from the feel of the combat/skills considering how good the engine feels in general. I'm not sure whether it's trying to feel more/too realistic and deliberate in its movements or not, but it somewhat takes away from my exprience at times.
Tooltips / Calculations
At first, I thought this was a really good addition... however, it appears that the Multiplicative and Addictive indicators on items are not as clear and concise as they may appear.
​
The Barrier source is supposed to be Additive from the UI display
Before and After activating Barrier
The above example, shows two Sources. The Barrier activation is supposed to be an additive source of Lucky Hit Chance, however, it is Multiplicative.

• Legendary Power Barrier = 1.26
• 3.5% Lucky Chance item prefix = 0.315
• Total Lucky Chance = 1.575 (The game is round this to 2 on the tooltip display for Spark).

I never expected it to be Additive in the first place, otherwise you're going to be allowing for potentially 100% Lucky Hit Chance builds, which I'm sure they want to avoid or limit to some capacity.
To put it simply, if this tooltip display is incorrect though, what else is?

• I have been listing everything related to Legendary Powers, but at this point, I don't know what's correct or not with the Multipliers.

We're going to have to go through every interaction in order to make sure now... which makes the [+] and [x] additions somewhat irrelevant.

Legendary Powers listings and values
User Interface
Probably the point that is going to have the most contention

In my opinion, the User Interface is FAR too Console influenced...

I understand that consoles are the largest market... and that it's inevitable that Blizzard are going to enter it, given the Activision-Blizzard relationship, but it's honestly too much.

• Why are all the interfaces such as Map, Collections, Social, Clan etc taking me OUT OF THE GAME?!
  • When I click on my collections, achievements, social and clan... I want them to be a pop-up and still be able to move freely in the background if something happens in the game or I want to continue running as I view a particular menu.
  • Even Diablo 3 did this better in some aspects, it simply feels like a step back, not a step forward.
• WHY IS THERE NO MINIMAP OVERLAY?!
  • Pushing Tab should display a minimap overlay, like almost every ARPG in existence. I should not be taken out of the game just to view where I am going better whilst I'm moving and/or in combat and the minimap in the top right takes away from your view of the game more often than not, including being too zoomed in anyway.
  • Once again, Diablo 3 did this better, why is it going backwards rather than forwards?

Achievements Page
Achievements Page UI
I like the left hand of this, no issue there. However, the right hand side is not fitting for PC players at all... or even really Console players with a large TV/Screen.
Why exactly are we limited to 3 achievements show before scrolling?

• I would love the UI to be scaled smaller and display significantly more per achievement page, why can't we view 5, 6 or 7 achievements before scrolling? Or have multiple achievements displayed side by side.
• If they want to keep the same view as now, then Lost Ark is a great reference for this as the Achievements page is laid out in a similar way, with the tabs on the left and achievements right, except it's scaled so you can view significantly more per achievement page before having to scroll.

It all simply feels too large and in your face for what is a base 100% UI scaling.
The Character Profile
Character Profile
It's simplistic, yes. It's straight to the point in some aspects... however the main things I dislike with this:

• Why are Gems a part of the Equipment inventory?
  • This is a very outdated concept, imo... and especially with all items taking up the same amount of inventory space, I feel like this should either go in its own tab at this point or be a currency that isn't even displayed as an item (I would prefer just a separate tab though since it would take away the feel of socketing a gem if it were a currency).
• Why does the "Profile" part exist under my Character and Title... it's pointless.
  • If I want to go to my Profile, I can do this elsewhere. It's something that people are rarely ever going to use in the first place and it's just taking up useful real-estate on the character profile, imo.
• Why does the "Materials & Stats" default to Materials?
  • I can see the majority of materials at the vendor anyway, but surely this should default to the option that is more useful to players, which I would argue is very obviously the Stats page. I don't click that button to see what materials I have, I primarily click that button to see how certain item affixes will influence my stats.

Storage Space
I can already see storage space being an issue... with only 50 slots at 5x10, it's not going to be long before you run out of space. This was very easy to do just in one Beta weekend by storing Legendary Power Aspects, Gems and some Rare item drops ready to be imprinted on.
Bosses
Circling back around to bosses, more specifically the Aspect Dungeon bosses. They all just feel... the same. I understand that bosses are going to be repeated often, that's just natural with an ARPG and game like this, but none of them feel particularly unique or feel like you have to think about anything that they do.

• There are certain bosses in games such as PoE for example, where whilst you enter the boss area and destroy the boss in a matter of seconds, there are certain attacks they can do or mechanics they have that are more dangerous if you don't eliminate it quickly. On top of the fact that the bosses just have more variety to them.

This could very much be just the limitation of Fractured Peaks and therefore significantly improve with all regions and the Nightmare Dungeons / Endgame in general.
Movement
A lot of the movement just doesn't feel very natural. After teleporting with the Sorceress, or evading on all characters or dashing on Rogue etc, the recovery animations seem... off. It feels like the recovery to perform actions following a movement skill is slightly too delayed and therefore makes the action feel clunkier rather than a fluid motion into the next skill.
This may just be a Beta issue though and unrelated to the launch version of the game.
Itemisation
I'm not going to go into this into too much detail, this horse has been beaten to death far too many times at this point... instead, what I want to mention here is how none of the items feel unique.
The ONLY item that I can recall and tell you exists is the Dark Sword, because it stands out and has a unique glow. I cannot name a single Legendary item that I had drop, because they don't really mean anything.

• There's no Stone of Jordan, or Mempo of Twilight, or Echoing Fury... or Tabula Rasa etc so far.

Sure, this may once again be an early game / Beta content issue and not a full release issue, but it's concerning that I don't feel like anything that I dropped really stood out to me, only their powers.
On a slightly separate note, can it be decided what it happening with items on the ground? Either you want them to be unidentified and we go and identify them with scrolls or a tome as usual and then vendor them, or you just let us see the item so we know what to pick up. Right now there's no real distinction between what drops.

Conclusion

Overall, I did enjoy my experience so far with the Beta and I'm sure that Necromancer and Druid will be fun next weekend as well.
Whilst there are a number of positive aspects to the game, there are many factors that are overly concerning to me this close to release and that I feel won't change between now and release if they ever change at all as some of them are clearly design choices.
It very much feels like in a lot of areas, we're taking a step back, not a step forward and considering some of the competition in this space, yes PoE especially (As much as you don't want to compare the two, they are in the same genre and space), is that really the direction that is best?
I'm sure that I'll get a good couple hundred hours total out of the game in its current state and come back and check on things season to season, there's enough to do in each region to occupy a good amount of time... but that's not what's going to keep me playing long term, the endgame, the QoL and the systems in the game are.

I do not think it's fair to make comments on Endgame and comparisons of things like builds at this moment in time, the Beta simply doesn't provide enough for us to make appropriate judgements.

I don't know how much longevity it's going to hold based on some of the things available to view in the Beta that we can compare now.