I'm over expansion of the conference, but if it's going to have to happen anyway I can understand expansion up to 18 or even 20 teams. With 18, you could still have Divisions in which you'd play each of the other Division schools every year and one crossover along with a typical three game non-con slate. It's too big and would take a decade to face the other divisions teams in a regular season rotation, but it could work. 20 and you're throwing out the crossover, but could still have functional Divisions. Anything more and you're not going to be able to play all of your Divisional opponents each year, which to me is a problem.
24? Sounds like a scheduling nightmare and schedule equality would be non existent.