There is a Pathfinder: Abomination Vaults ARPG coming out eventually that is focused more on cooperation (similar mechanics to fields/finishers from GW2) as well.

Oh wow this looks really close what I'm looking for, thanks!

Grim Dawn is tons of fun, and I've played it with friends a bit... and then another 750+ hours myself 😁. Good suggestion, but the reason I'm coming across as quite picky with ARPGs is because their co-op is more "playing near each other" rather than "co-operating to succeed together".

I actually started a DOS2 run with my friend, and it's really fun. I'm trying to get him to continue it with me, but he's in a pickle with his work at the moment and so hasn't had the time or energy. My only gripe with it is its turn-based nature (that's just a me thing though; I strongly prefer real time).

I find it interesting to say GW2 doesn’t have rotation heavy combat if you say you’ve played it to death. Definitely rotations at high-end play if you’re doing raid/strike CM’s. Or if you’re playing WvW or PvP seriously, they may not be “rotations” exactly, but close enough.

I've been playing GW2 for 1700+ hours and I've never purposefully learned a rotation. If I play a build for a long time, I often end up naturally happening across sequences of skills that could be considered rotations I guess, but I never feel forced into it. I haven't done a lot of Raids or Strikes, and this is partly the reason: I don't want to feel forced into a very specific build and executing a very specific rotation. I've been running some super casual Raid groups and we've been having a blast! But I don't think anyone is focusing that hard on rotations; I'm certainly not. As for WvW/PvP; I feel like rotations are even less of a thing here? I guess yeah, you want to execute your damage combo quickly, but the gameplay in competitive modes feels wayyy more tactical and reactive than PvE.

Combat in GW2 (and ESO to some degree) also feels incredibly dynamic right from the start, whereas in games like WoW it just felt like combat was targetting an enemy and pressing 123 til it died... for the first 50-100 hours. I'm sure these types of MMOs get more fun later in the game; I did enjoy a variety of these classic MMOs for 5-10 hours, and I played WoW endgame on private servers many years ago and it was quite a lot of fun. But these days, I just can't bring myself to get through them, and I certainly can't convince anyone I know to try them with me.

The main thing is, their levelling experiences just don't compare to GW2, and ESO to some extent, in terms of that action/tactical gameplay. I'm looking for games that allow us to just jump right in and be challenged right from the start, and while GW2/ESO aren't typically difficult from early on, there are still plenty of situations where you can find challenges given how quickly you level in GW2 and how the world is de-levelled in ESO. All that being said, I'd actually LOVE to give WoW another shot again, but due to my previous experiences, I don't want to spend so much money on something just to try something that I haven't enjoyed in the past. That's why I have a preference for games with a solid F2P or "free trial" experience.

Anyway, that was a lot of words. I do appreciate your and other people's suggestions here. I was considering putting all this info in my post description, but it would've blown out way too much 😅