I also agree with the sentiment that I don't mind new classes being delayed so that SE can release several at once. The majority of players have at least one Level 50 DoW/M* And I know a large number of people with all 50s (I am 13 levels away, myself). If only one of these classes is released, expect Ul'dah to be full of shouts for healers/tanks as everyone is levelling the new class.

Even if they release all three at the same time this will still occur, but to a lesser extent.