This isnt a suggestion on how regeneration SHOULD work this is just some suggestions on what could be added to whatever swd team is working on.
Ability to lay down and do a "soft regneration" like in the classics
ability to regen at will
during one of the more "explosive" regeneration idk if they will make it cause damage but if so maybe have it do damage to Mobs instead of players so a accidential regeneration wave doesnt go off on the server
when the hearts hit zero maybe instead of instantly regenerating you get a regneration 5 boost for a few seconds or minutes (depends on whatever system you guys setup) and after it counts down to zero or you drink a bucket of milk thats when you start to regenerate instead of in the middle of battle