Having just made my prior post, I'll now comment on this post. Vandy would not dominate in ANY BCS conference. However, they would have a better chance of being a middle of the pack program if they weren't forced to play the likes of UT, Florida, Georgia, LSU, Auburn, and Alabama on a regular basis.
It might help recruiting since as you point out they might have an easier hill to climb. It's probably easier to convince a kid at a lousy big east program that he can be the start of something great and go to a bcs, than it is to convince an sec bottom dweller. So in that sense i agree.