I played a lot of PoE and a bit of D4, IMO both are bad.
PoE has a lot of things, but everything is too complicated, theorycrafting is pretty much impossible without 3rd party tool, trade is annoying. Meanwhile D4 has is more streamlined, gameplay is too slow and there are not enough mobs. Open world feels empty and the game isn't as polished as it should be.
I hope other Hack and Slash games will be developed in the future, because I think PoE and D4 won't become better games.
Nice to see these restrictions getting removed, to be honest restricted trading has no sense in a 2023 MMORPG