Firstly, is the NDA lifted today like it does for most full video game releases?
Secondly, does content still scale to level 50? Or did they increase it with the addition of Dragonbone weapons, and if they increased it, what did they increase it to?
NDA is in effect until the DLC's full release tomorrow. Gstaff will also likely post something about it.
Don't think I can answer the last one. Even if you were in the beta, to descusit here would be in violation of the aformentioned agreement. It is, after all, DLC info that was not released by a Beth member...