If we're gonna have a 24-team playoff, put all 9 conference champions in
Make it like the NCAA tournament. And that leaves 15 at-large spots, more than enough to satisfy anyone.
I have never liked this concept of the "Power Four" and "Group of Five" because technically they're all playing at the same level, so reward all the conference champions now that we have the space. Maybe the "Power Four" might be afraid some in the "Group of Five" might start finding some NIL money and therefore have more competition, but name brand matters. The Georgias, Alabamas and Ohio States, etc., will always be relevant.