I'd have to respectfully disagree with you there, PTR. There are many better and more selective schools than UB that are able to recruit blue chip players, including Miami which has had success in the MAC and is ranked 66 in the US News rankings. Also, the last batch of football graduation rates had UB squarely in the middle.
To answer your early question IMO, UB's facilities are not BCS caliber, the program lacks institutional and alumni support, WNY is more interested in , WNY does not have the talent to feed into a BCS program and, in general, UB adds very little to nothing to the Big East.
If the Bills were to leave town, it would be my hope that Syracuse would be able to attract a very small percentage of fans wanting to see major D-1 football. Then again, I don' think that would be a given by any means.