Grenades are going to be part of your loadout. Like an armor piece. They will be infinite but changeable and Im pretty sure they are not class specific. I think the warlock stuff is really unique , glowing projectiles and buffs for the whole team. While titans abilities seem melee/defensive and hunter gets a laser knife and magic bullets. And if these have their own skill trees and there are other possible focuses itll be awesome. City of heroes lasted ten years and even tho it was a fairly primitive mmo they updated it often enough that by the end it was almost impossible to look and act like the other avatars. New clothing options and new missions were uploaded along with new powers and emotes. Im hoping thats the stuff they really bring from the mmo game genre.