Personally, I feel that it shouldn't be restricted. In fact, I feel that all "buff" supers (Gunslingers, Bladedancers, Sunsingers) ought to have their activation animations made much quicker, or eliminated altogether. In fact, I think that should be done to all animations in this game with the exception of the melee attacks. If I hit the grenade button, I expect to see a grenade go flying, not sit there cursing the fact that I was killed before the throw animation completed. Never had that problem in Halo.