I think the main issue with ACC expansion is that the remaining schools are all pretty happy to be in the ACC as it is currently constructed. Nobody wants to leave, unless other dominoes are put into motion and they are forced to act.
The problem, much like what happened to the Big East, is that once the B1G, SEC start snooping around, ACC schools may be forced to act out of fear of being left behind.
The way the B1G Network works (as best I understand) is that it's all based off of cable subscribers and the associated subscriber fees with the network. I believe the SEC is forming a network and that their network would work the same way.
I really think that this the most likely and best realistic situation for UConn:
B1G (16) - North Carolina, Virginia
SEC (16) - North Carolina State, Virginia Tech
ACC (12) - UConn, South Florida, Cincinnati, Navy (fb-only)
BigXII (12) - Florida State, Clemson
Pac (12) - No moves.