The way they do the playoffs is what's killing college football. Here's how to fix it.
First, conference championships should mean something. Under the current 4 team format, the only teams that should be eligible are conference champions. Lose the conference championship? The conference title games should be considered part of the playoff, lose and you're done.
You want to expand the playoffs to 8 teams? The 5 major conference champs are automatically in (no matter the record). Then add 3 at large invitees. Two of the invitees (at the very least) should come from one of the Power 5 conferences. If a Group of 5 team has an exemplary year, throw a bone at them and let them have an invitee. This year, Cincinnati would have been that team.
Wrap it up, but a bow on it and interest in CFB increases 10 fold.