I should note I'm not asking this so people can flame each other, start arguments, or be downright rude. Friendly debates are welcome, but I encourage people to be civil to one another, because this is just a game we're talking about. This is a genuine question.
What about 'Wrath of The Lich King' was childish, in your opinion? I simply don't see it, to be honest. Was it how the Blue-Eyed Zombie looked? Was it the excessive usage of zombies and zombie dragons or aspect of it? Was it the way Northrend looked/Viking/Scandinavian/ the Knight vs Dragon vs Undead vs Uncead Dragon theme? Was it because overall, what didn't you like about it or why do you think they attract the kiddies?
If you felt the opposite, why did you feel that way, then? What about it was equally or more hardcore than other expansions? What did you like about it overall?
Mod-note: This thread seems to be more flamebaiting than being part of a more constructive over view. Other users have seen connections with it to others on the forum - I take the chance to lock it before more problems.