Horde has Paladins.
Arenas still exist.
Bring the Player, not the Class.
Achivement system.
Dual-Specs.
10/25 man Lockouts.
Heroic Difficulty for both Dungeons and Raids.
Flying Mounts.
Justice, Conquest and Valor Points.
Dailies for people that don't raid or like alternative forms of progression.
I can go on, but feel I have addressed this whine.