In basketball, all of the conference champs get in so the arguments made by teams 69-72 aren't strong ones. A 4 team playoff in CFB means at least one P5 conference champ is being left out along with a number of teams with extremely good arguments. I think it should go to an 8 team playoff and end there. You include all of the P5 champs, you can have one spot for the highest non-P5 team if within the top 15 or something and then two spots for the best of the rest. It also means you can lose a game or maybe two, depending on the losses, and still have a shot. Usually the end of the season only matters to a couple of teams in the scheme of things, this would have more teams in the mix playing for something until that final whistle of the regular season.