For those disappointed, wow tried to do one of those super massive size fights with deathwing, and it just didn't feel epic. You spend the majority of the fight just fighting adds/his limbs and don't really feel like you're doing much. As long as there's a decent reason why he's smaller I'm completely ok with fighting the scaled down version instead of being ants slowly cutting off one of his toes so he falls over and we can stab his eye for a while before he stands up again.