I have to admit I am surprised the basics are not already in the C-store like Character slots and name changes. That is what I would spend my Credits on. After all, you basically need 4 slots to play the basics the game has to offer and I guess 6 if the Kilngon faction has the same 3 classes. That would be enough for one of everything.
If they wait around too long my free C-Points may go to CO instead.