Maybe the fact that in a team based game mode like trials they can effectively remove 1,2, or all three players from an engagement without actually having to engage. Simply toss the grenade around a corner and push for easy kills. Just because it doesn't one hit is not a balancing factor and the "it takes up perk slots" argument is retarded. Case and point of this is pre patch sunbreakers. The entire subclass is geared toward the super and it was still nerfed and rightfully so.