3 conferences are at 14, 16 is not a lot bigger. 20's bigger & easier sched
They could go to 18, but that makes it so divisions will not play each other until the championship. I don't see that. If there are 4 divisions of 5, you can play your close rivals every year (attendance and TV ratings are up for these games), you play another division to determine who goes to the conference championship and you rotate so everyone plays each other at least every six years in a home and away match up. (Again attendance and ratings go up) CFB needs this sooner rather than later with the cord cutting surging!
PS Mike you been hanging out here? We have been talking about this for several years on TSL CRA.