I really think Syracuse and Louisville are having buyers' remorse about joining the ACC, since they realize there is a blatant double standard with UNC that has hit their beloved basketball programs especially hard....Boeheim at Syracuse is especially PO'ed about how they were treated over the Fab Melo situation, which pales in comparison to what went on in Chapel Hill. Since the Big Ten is a good fit geographically and has deep pockets, I would expect both schools to at least look into the possibility of jumping there if the numbers justify such a move.
FSU leaving for the SEC is more of a pipe dream (plus, the almighty Gators would likely veto it), but NC State is a different situation, since the SEC would like to expand its conference footprint, and they've already taken in another "kid brother" who was abused by an 800-pound gorilla within the same state (see Texas A&M)...
I have no doubt many are not impressed with how the ACC is run and while I am not going to blame losses on bad officiating. I will say that they need to vastly improve the quality of the people they hire for officiating any type of sporting events.