the amount of teams in college football, but perhaps the closest thing we could get to may look something like this:
Reduce non-conference games to play as many teams within the conference as possible. At most play two OOC games (one FCS, one FBS) perhaps go down to one.
Each conference has its own playoff, top 4-6 teams in each conference compete for a spot in the CFB playoff - the large conferences
P5 conferences advance 2 teams to the CFP playoff, G5 conference advance their conference champ.
You could even let each conference set up their own rules on how teams advance and represent the conference in the CFB playoff. Given how conferences differ in size and makeup (some are top heavy, others with a good amount of parity) it may make sense for each conference to operate slightly differently than the others.
I believe something like this is the only way to do it where we make it “fair” and take out “resumes” and subjectivity from a biased committee.
DISCLAIMER: I am fully aware this type of setup will never happen, the B1G and the SEC are fighting for the opposite direction. They don’t want parity, they want any power, control, and money. They would never agree on a playoff system that gave equal access to other conferences. This is strictly a hypothetical.