You can't level in the meantime? Or are you one of those spacebar players who rushed through the game and is now complaining about lack of end-game?
I suspect it's the latter.
Personally, I just dinged 50 having not space barred a single thing. I just had a lot of time on my hands this last week.
We were, however, told that every flashpoint would have a hard mode.
So far, all the 'hangar' flashpoints (Hammer, Athiss, Mandalorian Raiders, Cademimu, Colicoid War Games and Red Reaper) are all missing their hard modes.
So.. it's not so much complaining about lack of end game content, it's complaining that the content that we were led to believe would be there, is not actually there.
I'm not complaining too loudly, I still have plenty of **** to do. It's just.. half the content is missing. That seems like a pretty big oversight.