One of my favorite heavies is still the Sleeper. Once you get the catalyst, it’s just an all around great weapon. It’s good for invading/countering invaders, smacks blockers and otherwise meaty health bars, and does damn fine boss damage.

Exactly, and I haven't heard much discussion on this from Bungie's perspective. The ammo economy for Truth needs to be adjusted to stop toxic lobbies. Loading into those games makes me want to quit an not waste my time on Gambit. Which is a shame, cuz I actually like the game mode idea.