FSU is one of the premier football brands in the country. The program had some down years because Jimbo left a mess and they took a while to find a good coach. But they've got one now. That program is $.
Just look at FSU TV ratings, even in down years. Top 15 in the country during losing seasons. They would add massive value to either of the P2, and both of them know it. Don't believe any of the nonsense about the B1G or SEC not being interested. They're just waiting for the legal mess to clear up, whenever that is. I would wager the B1G even makes an exception to their vaunted AAU rule. They just don't want to be seen as destabilizing the ACC before any outcome is even possible, just like when the B1G waited around until the Pac12 imploded before they invited O and W -- as if we didn't know they caused the whole thing.
Let's walk through your logic:
1) FSU is awesome. Whatever.
2) The Big 10 and SEC want FSU. Doubt it, but whatever.
3) FSU and Clemson leave, ACC collapses.
4) Any of the good ACC programs find a home in one of the P3, a few dregs (Syracuse, BCU) are flailing looking for a home.
5) In this scenario, UConn will never get its football program into a major conference.
6) Does this mean you are advocating shutting down the UConn football program?