So Why assume removal of Classes?

[Ecks007]

I don't think they will be removed from the game. Existing classes will still... exist. But being as they are not including a class for Dark Knight, it may very well be that from 3.0 onward future Jobs will not have a class.

Or they may add new classes when they feel the need for new cross class abilities to be necessary.

But judging from their approach to Dark Knight, I think they will likely not be adding any new classes after 3.0. Who knows for sure though.