Everything mate lol. Even though there's Classes, each class can still use all weapons and basically be a random job. Apparently people only use a certain staff at top levels too for the buffs it gives so it's a little crappy lol. I played to like level 15 and got bored. Even playing with friends aint fun. Specially when you enter and instance with the party for the story and they vanish when entering certain spots so that isn't cool either. It just doesn't touch the single player at all, should have made TES6 and made it 4 player coop. That's all we all ever wanted! Lol