re: I keep seeing the argument for "the 4 best teams should be in the playoff"

Championship Games are an opportunity to get a resume-boosting win at this point, and I think that's good enough for now. If the playoff were to get expanded to eight teams I'd be fine with the five P5 champions getting a spot automatically. But right now, with only four spots available, it doesn't make sense when there is such a disparity in conferences and divisions.