A cool mechanic I've been thinking about is during a raid or dungeon, either some parts or all of it you can't use your powers. I.e. grenade, melee, class, or super until the boss. I think this would be a really cool mechanic to push fire teams to adapt to new metas and new things to try, making the meta of using supers and abilities to make things sometimes laughably easy, would add a new challenge to the scene of a raid or dungeon.