It seems it's only a matter of time to be honest. I'm in my 8th year of athletics administration and I feel that in the next 20 years, the big schools will leave to form their own 12-team conferences.
Will players be paid? Maybe. Could see some other dramatic changes.
Just call it Division 1, Division 2 can be the leftovers + a few (current FCS) schools, Division 3 can be what is now FCS, Division 4 the current D2, and Mount Union can play for the Division 5 Championship.
In trying to make things more simple, I just confused myself.