To be totally honest, SE did not think this whole class/job system through very well. And because of this they will have a difficult time adding any jobs to the current base classes.

If they had planned slightly ahead, they would have thought to stop ALL Class abilities and traits at level 30, and transfer every skill gained after that to the job side.

This would leave a very basic level 30 class with 30 levels worth of skill gap to build new skills around.

What you have now is a class that is 90% set in stone, with room for very little modification via job abilities.

I see a total revamp of all classes and jobs within 6 months, just to make things work in the long run.

Also they should not have released a single class with dual job capabilities....