Warlock stuff looks ballin, pvp battles grounds look unique now the whiners can shut up. Quests that buff you to allows you to roll on stuff / day long buff stats sounds fun. All the whining aside on the WoW forums (lol) this xpack look pretty nice.
edit: We don't even know what VP will give this xpack, tier might be raid only like in Dragon Soul and past expansions, and the only thing VP will give is stuff to help you with raiding.
Also haters be hatin'