Who cares what blizzard does. It's all quests as far as I know. Balance is not an issue they would really need to address without a competitive pvp. Bungie will have to buff and nerf things from time to time to get the desired affect in crucible. If a weapon has no downside (hc's that can beat anything at long, medium, or short range and have awsome fire rate and dot) it must be nerfed. Trade offs=balance.