Honestly pvp is probably the most innovative and new feeling fun things they did for arpgs. Cooldowns actually make sense for pvp.
Diablo mechanics designed from the ground up feel actually better and maybe even healthier for a pvp game above all else.
I would make sure to also keep developing pvp as well as fix all the issues with having fun gearing up and putting time into a long term character in the first place. Basically adding all the end game that’s missing, fixing uniques being boring, stash and sorting through items issues and lagg.
Add 2 more interesting pvp game modes like another extraction mode. Like full on D4 Escape From Tarkov with cool maps, and deeper mechanics and stuff to do.
And a team v team lane pushing mode like mini alterac valley or deathmatch or something.
Then I might consider returning to D4.
Pvp is unironically one of D4 greatest strengths. I would capitalise on that big time.
It’s the most fun and balanced pvp I’ve played in any arpg.
Lagg is atrocious though.