Administrators in universities really live in a shell, isolated from the real world, don't they? The businesses that I have been involved in have all dealt with gaining and losing clients. That's just tough. You move on. Miami et al have a contract with the BE that states what they must do to ever leave the BE. They are living up to their end of that contract, but the BE somehow finds this unacceptable.
It is almost as if the BE is trying to choke down a poison pill now, only they don't even realize it. By filing this lawsuit, Pittsburgh, VA Tech and West Virginia, in particuliar, may find themselves unattractive to any other conferences. Unless proper groveling and concessions are given in the future to the SEC, Big Ten, etc., they may be doomed.