I say no to this and it's still months till they get implemented. Which SE can then add more classes if they wish to before the official patch. Besides there is still the TGS in September that they might announce more stuff.

Oh and out of curiosity OP'ster, I see that you still have 2 class plus a third that has instant queue for duty finder that are not even half way to 50. Is there a reason you haven't finished them. May I suggest saving them for after rogue/ninja drops.. Just curious. :>