I'm arguing some of the developers know it's broken (including arguably all PoE leads and No Rest for the Wicked leads)(I would extend this to an even larger group but I won't to keep it verifiable).

I don't think all isometric ARPGs copy D2 because they think it's not broken, I think they do it because it was an innovative genre defining game for its time, most of the devs look back to it with nostalgia, and it was a blockbuster hit. And I wouldn't minimize the innovations in the scene to just QoL. I think what PoE1 and 2 and LE are doing around their systems is very innovative, including their financing model and tech. I would argue that they're still fundamentally maintaining the moment to moment loop while expanding all the subsystems that give the game as a whole massive complexity and content - and that's great but will inevitably pale in comparison to a game that innovates the moment to moment gameplay. I think most genres have innovated their core moment to moment gameplay compared to their genre defining counterparts 25 years ago, but that ARPGs haven't.

And I completely disagree on my expectations being "unrealistic, unknown to the genre, or incompatible". That's laughable imo and something only a player incapable of imagining change would say.

• to be self-insert character or at least one of many characters as a form of self expression
  • Diablo 4, LE, and PoE2 (going forward "the big 3") all do this well to extremely well. Diablos transmog system is peak, PoE2 has unbelievably good cosmetics and they've just started, LE is a small studio but I still feel like I'm playing my wizard when I play a wizard.
• I want mechanical self expression ideally in the form of dozens or hundreds of skills and their customization along with a skill tree that enables further customization on how your character plays. My load out of 10 abilities should look and feel and play very differently than your load out of 10 abilities.
  • the big three all do this but do it poorly. Diablo has low variability in abilities, poor customization, and my load out consists of mostly number go up choices. But importantly the bones are there, this makes it neither non-compatible nor unknown to the genre, it just means these devs did a poor job implementing it. PoE has a ton of this but fails to provide a meaningful load out or mechanical skill expression because nearly all builds converge to press a single button to blow up the screen and a second button to move around the screen fast. Again, they have all of the bones and far more customization than I'd ever expect from a game, and yet a lot of it is meaningless the second you close Path builder and actually start playing because it trivializes the game.
• I want to fight monsters and bosses that are varied, challenging, and uniquely rewarding ideally. Challenging and varied are putting in a lot of work in that sentence so I want to further expound and say combat should feel like a dance, a puzzle, high octane, and skill rewarding (not simply build skill or farming skill, but actual play skill).
  • the big three have varied down, and arguably uniquely rewarding down (D4 sucks at this imo) but they all falter on challenging or good moment to moment gameplay. I would argue PoE2 campaign is pretty good for this, but mid-end game is pretty awful and it really only ever shines in the boss arenas. They seem incapable of further innovating the mob combat because they seem to differentiate good combat in a boss arena (engaging) from good combat while mapping (mindless). LE's Pinnacle boss is fantastic for this (and I like it better than all PoE bosses at this moment). Even as I heap praise in these areas, I'm rarely using reactive abilities, I'm rarely using multiple skills in a fight that aren't just buff my one damage skill. Again, none of this is incompatible, none of this is unknown to the genre, all of this is achievable, and in a lot of places already in place just used poorly from a design perspective.
• I want the pacing around playing to be focused on fighting and clearing encounters more so than exploration and discovery.
  • the big three do this perfectly, as that's essentially one of the ARPG innovations - fight fight fight and then plan/craft/prepare then fight fight fight. I think poe has some work with their towers and LE has some work with the size and rewards of their maps, but it's hard to tease out changes here when this is typically the most mindless portion of all the games. They keep me clicking blow up screen at the right pace, I just wish I didn't have to. Again, this quality is completely inline with the genre and done well.
• I want an additional system of collectibles that further modify the way I play and look, most consistently this looks like loot or crafting (this however should not be primarily satisfied with #'s go up).
  • again, the big 3 all do this well. I wish the qualities on items were more impactful and not just number go slightly up, but generally they're doing okay. The uniques being added to PoE2 have been awesome to see, like the song crossbow and stuff, so I'm hopeful. Diablo let's you collect transmogs. Again, totally typical of this genre.
• I want to do this with friends in a multiplayer format, ideally at times requiring multiplayer because that opens up a lot of unused design space (looking at you remnant 2 which was awesome or only theoretically Diablo world bosses and black dungeon).
  • multiplayer is possible and rewarded in all of the big 3. Only Diablo has content designed for multiplayer. I think PoE has a ways to go on making this experience more multiplayer friendly, in fact it's my least favorite to play with friends despite it being my favorite of the three by miles. I wish they'd design more multiplayer content but I understand why they don't. If the combat wasn't so screen explosion based it would probably be a decent enough experience. Again, another quality entirely a part of this genre already just not fully implemented well.

So what exactly is incompatible here? I think the answer you'd give is engaging combat, because that's what I always get when I have this conversation. "All changes that have already been made to the genre are great but no more changes to the genre would be good." That's the sentiment I always get. "I want to mindlessly grind mobs while watching a show I can only partially pay attention to on my second screen." Is something I get a lot as well. Which just feels like a mobile game, an idle clicker, but not what most people want when they go to play a video game including in the ARPG genre. Even if we said there's room for idle clickers in the genre, why are our stand out examples all idle clickers, that to me feels like a clear sign of stagnation in a genre. Dota, rainbow six, BG3, BioShock, portal 2 - none of these games would be better if they were less engaging such that we could watch TV on the side, so why is it okay when talking about the genre defining games of our Gen in isometric Diablo-like ARPGs?