^^ love the "Don't want to learn a class" comment, bitter bitter bitter. I think they'll learn it just as well in half the time played doing mindless PVE.
Blizzard are wising up, that's why they're adding it.
To be fair I can say easily that I don't know any of the classes as well as say someone that has played since vanilla none stop. Or as someone that actually leveled from 1-90 normally and learnt all the abilities of the class. Plus PvE is not mindless. Unless you mean LFR... normal/HC is actually a decent challenge in mists compared to Cata with all its nerfs.