No it isn't but you are right about no argument to be made about it. They aren't changing AI behavior. They are adding bumpers because they didn't think things through. Is it an exploit if I get knocked off or fall off a cliff? Explosion or not, me trying to get away from a grenade for instance. No, it's -blam!-ing physics. Same thing, he backs away from Area of Effect attacks and falls off a cliff. If it were truly a bug the AI would be getting fixed but it is not. There's an answer anyway since you clearly don't understand. Bungie is not being honest and neither are you. I will but that's just how I roll, my gravity challenged friend.