So this post seems to only be aimed at exotic gear. As other gear doesn't give class specific abilities. I would say those are still fairly balanced. Voidfang gives you grenade at the ready everytime you spawn. Extremely useful. Most warlock class features seem centered on damage resistence regeneration or grenade enhancements. Three things that make Warlocks extremely dangerous so I don't really see any real discrepancy in class armor abilities. Especially not over a titan getting two grenades.