I played Path of Exile on and off over 2.5 years and the biggest issues for me were,
- game is ugly
- it has no style
- it's not SP friendly
- animation is stiff
- enemy design is shit
Grim Dawn was the same, except that it was SP friendly.
Titan Quest I never played, but it always looked second rate to me.
Diablo III is dumbed down, geared towards online play and looks like WoW.
Lost Ark does some things right, but is a furry MMO.
Torchlight games are OK mechanically, but I can't stand the cartoony art direction.
Diablo IV got the art direction right, but is even more dumbed down than Diablo III.
In the end, Diablo II is still the benchmark. Despite being 20 years old, this 2.5D game still feels incredibly crisp and boasts an intricate gothic horror atmosphere with a great attention to detail.