So yeah - whenever you get lethal with obliterate despite the enemy having a huge board, only the enemy general explodes, even though it would feel oh-so-satisfying to see all those minions the enemy has been placing over the last few turns (cough variax wraithlings) go poof as well.
Yeah, this isn’t high-priority, and I doubt it’ll get changed, but man, I sometimes even regret not getting lethal -2hp so as to behold the beauty that is the board wipe of a stacked obliterate.