Look at what March Madness has done for basketball, it wouldn't be that difficult to replicate that in football. As Leach explained, everyone else has it figured out. they do it in High School, FCS has an expanded playoff, and the NFL has 14 out of 32 teams make the playoffs. You can use the bowls as playoff games. I say start with 32 teams, that means the teams that play in the finals play 5 extra games. Everyone has to play 9 conference games, cut the season to 11 games, eliminate the conference championship. so the teams making it to the finals play 16 games. Currently they play 12 games, plus the conference championship, plus 3-4 playoff games, they are at 15-16 with the current set up.
The problem is the bowls have lost all their meaning, players opt into the portal in December, and the team that qualified for the bowl is a shell of the team that won 8-10 games. A playoff format using the bowls would help 16 bowls a whole lot. You can still have the others for the teams that don't make the playoffs, heck you could even turn the rest of the bowls into an NIT type of format. The lessor bowls are dying, a playoff format could help save them. A 32 team format would require 31 sites for all the games, all meaningful games.