I'd go to a 4 team all automatic qualifier system.
B1G goes to 3 6 team divisions, 3 division winners and next best do a 4 team playoff to determine champion, champion gets automatic spot.
SEC does something similar, maybe 2 8 team divisions, or 4 4 team pods, 4 team playoff with champion getting automatic spot.
ACC and Big 12 have title games then the two conference champions play a game for 3rd spot.
After G5 title game, they do a 4 team tournament with their top 4 rated champions for the 4th spot.
Seed the four teams and have the national semifinals on New Years Day and the title game on the following Saturday.
B1G goes to 3 6 team divisions, 3 division winners and next best do a 4 team playoff to determine champion, champion gets automatic spot.
SEC does something similar, maybe 2 8 team divisions, or 4 4 team pods, 4 team playoff with champion getting automatic spot.
ACC and Big 12 have title games then the two conference champions play a game for 3rd spot.
After G5 title game, they do a 4 team tournament with their top 4 rated champions for the 4th spot.
Seed the four teams and have the national semifinals on New Years Day and the title game on the following Saturday.