Did you know before the taken king came out, storm callers were supposed to have lightning grenades? Honestly if bungie had kept the lightning grenades on storm callers I feel trip mines would have been left alone. I also feel every subclass in the game needs to have one sticky grenade that of course act differently. Like suppression grenades from defenders should stick to someone and simply do lets say 180 damage if stuck and also apply the suppression if the person survived.