The grenade is OP because of its ability to hit multiple targets without being precise. Once someone hits you with it, all they have to do is hit you with one round of a primary and it will kill you. Also, once hit, the burn is long enough for the person who hit you to chase you down and at least keep your health down until you are cornered or trapped. If you ha e enough discipline, your grenade will be recharged by the time your target gets his health back leading to an endless loop of Firebolt spamming. All other grenades have some type of drawback, you either have to be precise, or the grenade deals a max of 80 damage. The only thing comparable to Firebolts is the Wombo Combo which is also OP. My advice would be to look at this from everyone's perspective instead of defending an OP grenade because that's your favorite class. If you have ever played Trials or Crucible at all as something other than a Warlock, you would know exactly what people feel when they get paired up against a team of warlocks. If you don't understand this, try playing CoD MW2 without using a Newb Tube