A while ago, when the SEC went to 16 and then the Big Ten to 16, I suggested that the CCG be the No. 1 team vs the top team they hadn't played against.
https://csnbbs.com/thread-959903.html
Everyone hated that idea. Nobody wanted to see Ohio State in the CCG next year agaisnt the top finisher out of USC, UCLA, Washington, Minnesota, Wisconsin, Illinois, Rutgers and Maryland. (This was before ORegon and Washington to the Big Ten, but opinions on the matter were pretty clear and pretty vehement.) Nobody wanted to see 12-0 Texas next year against the top finisher out of Mizzou, LSU, Ole Miss, Tennessee, Alabama, Auburn and South Carolina.
(Unless that was the No. 1 vs No.2 matchup of course.)
But I think the merits of my idea have a place. Without divisions for 16, 17, 18 team leagues you're going to have a lot of teams with the same 8-0, 8-1, 7-2 conference records.
Looking at the Big 12 right now, assuming that all the favorites win next weekend, you've got Texas at #1 and a three-team pileup at #2, OU, OSU, KSU. If Texas poops the bed, you've got a four-team pileup.
Why isn't "avoid rematches" the best tiebreaker?
EDIT: How this would work this year in the big 12.
(Everybody wins). #1 Texas played OU and Kansas State. Didn't play Oklahoma State. Simple.
(Texas loses, everybody else wins). 4-way tie at 7-2. Go through the usual list of tiebreakers to figure out who's No.1, and then the CCG is either Texas-Oklahoma State or Oklahoma- Kansas State.