Given the financial considerations and this $20.5M number not officially being tied to a specific sport, I think some schools are going to have to take a long, hard look at whether they should be offering football any more along with moving other sports to club status.
For example, if you're Duke and basketball is the most important sport to your university, maybe you drop football so you aren't using $15M on football like everyone else and leaving too little to dominate in basketball. Might they be better off if they offered Men's & Women's Soccer in the fall, Men's & Women's Lacrosse in the Spring, and Men's & Women's Basketball being the featured sports for the Winter across both academic semesters?
They could then put $15M into MBB and then outspend their competition across the other 3 sports. Why wouldn't they do this? Why wouldn't others like UConn, Kansas, Arizona, Indiana, Kentucky and others where the state and alums care most about basketball make the decision to drop football? Is football so important that having it and being mediocre at it is so vital that they are willing to also allow their basketball programs to become mediocre as they can't pay their players as well as Big East programs and universities like Gonzaga that don't offer football? Going down from the P4, why would resource constrained ADs like New Mexico, Nevada, UTEP, etc. in the new MWC that pack their basketball arenas and have a rich tradition there maintain football programs that usually suck and can't draw a crowd? I wouldn't be surprised at all if the MWC drops football and becomes a western version of the Big East.
Also, this could be the line that's drawn in the ACC and Big 12: total merger and split with the football-committed schools becoming one conference and the basketball-focused schools becoming the other conference.