Here’s my solution:
Create 8 super conferences of 16 teams in FBS. We’d need to add 4 teams, I think, to have 128 team in FBS.
Each conference would have two divisions of 8 teams.
Expand the playoffs to 8 teams.
Win your division and make the conference championship. Win the conference and make the 8 team playoff. (The conference championship games are essentially the first round of the playoffs.)
This way, there are no polls, there are no committees, there is no subjective judging. Every single one of the 128 teams has the same opportunity to win the national championship at the start of the season.
*ND would have to join a conference or be left out.
I like this, with one addition, the two 8 team divisions for each conf will be tiered each year to Div-1 and Div-2 each year
Div-1 top 8 teams and Div-2 only play teams in their division. Top 2 teams from Div-2 conf move up to Div-1, bottom 2 from each Div-1 conf move down to Div-2 each year.
Positives
Season starts with only 64 teams really competing for national championship. They only play each other, eliminates easy games. All teams have strong SoS.
Bottom 64 teams compete for Div 2 championship, plus to be elevated to Div-1 next year. Gives mid-major schools something to play for.
Top 64 schools, even bad teams will be playing to stay in Div-1 for the following year. Makes more games have meaning.
Non factory team will have National championship to play for.
Negative:
NCAA roster turn over - If team has bad year falls to Div-2, the following year they could recruit once in generation QB win Div-2 title, and actual be better then Div-1 champion. But they still won title, and it was still against weaker competition, so you would never really know.
Team like FSU this year may drop: dominate Di-2 following year.
Rival Game would be dependent on Tiers.
Example
ACC picks up:
East Carolina
Notre Dame
Next year
Clemson, Miami, Louisville, Va Tech, NC State, Wake, Ga Tech, Dotre Dame would be Div-1
FSU, Pitt, Duke, Cuse, Pitt, uVA, UNC, East Carolina would be Div-2
Div 1 would only play Div-1 in ACC, plus 4 out of conference Games (Div-1 from other Conf). Bottom 2 teams would fall to Div-2 following year
Div 2 would only play Div-2 in ACC, plus 4 out of conference Games (Div-2 from other Conf). Top2 teams would be promoted to Div-1 the following year