Obviously the ACC doesn't believe in their Grant of Rights or they wouldn't still be suing Maryland which is all about trying to stop other schools from trying to leave the conference.
It's interesting FSU's president bolted just shortly before the announcement of this ACC network. He supposedly signed FSU up under promises of an ACC network coming into place from news accounts at the time.
Sometimes such things are unrelated, but then again sometimes they are.
He left for a better job at a better university, just as Clements left WVU for Clemson and Gee left WVU for OSU years ago. (And if UNC,UVa, or a Big Ten school, e.g., call Clements later, he'll leave Clemson...)