I really don't know how Larian will pull off killing vampire lords, devils and similar creatures before lvl 10.
In NWN2 low levels were a drag, you get through them slowly and they suck, its mid to epic levels that were really fun (12-30) because you got to the really interesting and challanging encounters.

Depending on where Larian takes the story, a low level campaign might not be fitting.
If we end up meddling in the affairs of the gods or even deciding about their fate, we must be at least lvl 20.