The buyout litigation isn't freezing team movement. Best interests are. As the board lies, UNC, Duke, FSU, Clemson, GT, and UVA all have the best deal they're going to get, all factors considered, in the ACC. That wasn't true for MD, who needed quick cash to wallpaper past fiscal mistakes, and never really felt the love in the ACC anyway. The irony is, MD's defection, and the subsequent addition of Louisville, is going to be the transaction that guarantees the long-term viability of the ACC.
Football is driving all of this. The ACC is probably the 5th best conference right now in terms of football. They have survived to this point by being quicker on the draw than the Big East, but they are far from "solid".