Skills
What mechanic would you steal from another class or game?
My various Warriors absolutely want the Barbarian's Arsenal system from the Diablo 4 beta I played at BlizzCon 2019.
In Diablo 4, you can respec your character’s skills and abilities as much as you like, but it won’t be free
In the December 2020 Quarterly Update for Diablo 4, we found out that the Skill Tree for the game has essentially been locked in as a system -- as Game Director Luis Barriga put it in the post, the general consensus is that the Skill Tree is headed in a solid direction and now it's time to iterate on and improve it.
Totem Talk: Skills we’re waving farewell to as Enhancement in Legion
If you log in to play your Enhancement Shaman today, you have dead abilities on your bar.