Of course you do. But I don’t see them going past 24 apiece anytime soon. There just are not that many schools that play football well and make TV sense to advertisers . Oregon, FSU, Miami, Oklahoma State, Arizona, Arizona State, UNC, California, Stanford, Notre Dame, Clemson, West Virginia, Colorado, Baylor, Washington and Virginia are a possible sixteen that could expand the two conferences to 24 each and 48 total.
What would be left to then create a “next 48”? From the ACC you would have GT, Louisville, N C State, Wake, Duke, Pitt, Syracuse, Virginia Tech and BC. From the Big 12 Cincinnati, UCF, Houston, BYU, Kansas, Kansas State, Texas Tech, Iowa State and TCU. From the PAC 12 you would have Utah, Washington State and Oregon State. That’s 21 of 48 coming from the Power 5. You pick the next best 27 from the AAC, Sun Belt, CUSA, and Mountain West.
What you don’t take from those conferences and the MAC combine with the best from the Football Championship Division for the third 48. Each should play only in their group of 48 and stage their own championships.
This model could work. And, if you really wanted to make college football exciting with this system, relegate and promote about six or eight teams every four years.