A few things I think I think:
1. The expanded playoff to 12 teams made the regular season a lot more interesting with a lot more games I cared about in November.
2. The issues with different conferences playing different schedules with regard to the number of conference games was exacerbated by realignment. How different do things look right now if SEC teams were playing a 9th conference game instead of taking on schools like UFSP in November?
3. The issue of conferences being able to fairly determine their champions is thrown off kilter when everyone doesn't play everyone. Conferences have gotten too big for several reasons, but this is a major problem I'm highlighting here. Frankly, anything more than 10 is too big.
Anyway, I thought things were improved this year but that there's still a lot of work to do.
I think divisions solves #3 about as well a it can be solved.
A zipper setup with yearly division "realignment" would also solve the issue of chronically weak division like the B1G 10 had.
Basically, you pair teams off with a rival that they'll play every year, but always be in the opposite division. For the Big XII the pairs would look like BYU-Utah, Arizona-ASU, Cincy-WVa., etc. Take the higher finishing team in each pair to rank each pair, then alternate adding each team to a division. This year ASU would be #1, Arizona in the oppo division with #2 ISU, who I guess you pair with Okie Lite who is now in a division with ASU, on down the line.
Now you have two divisions of 8 teams, you play your 7 division mates, your zipper/rival partner, and the closest ranked opponent in the opposite division. This way you preserve the rivalry, you get a rematch of last year's CCG, something a lot closer to equally difficult schedules, and a round robin in the division to ensure that you at least have H2H results for the first tiebreaker.
The rub is getting everyone on board with who their "rival" is, After the obvious ones (KU/KSU, Ariz./ASU, UU/BYU, TCU/Baylor, Cincy/WVa) the other 6 are Okie Lite, ISU, CU, UCF, Houston, TexTech. Houston could pair with either UCF or Tech, any of the old Big8/Big XII pairings could work, UCF/CU could make a lot of sense.