It's not as simple as it seems. TCU, for instance, has been in 3 conferences in 18 months. Next season, Butler will be in it's 3rd conference in 3 seasons. There's a DIII conference that's had over 30 different members in 15 years.
For fun, I tried to realign the D1 conferences. No matter how you do it, with 12 teams/conference, you end up with some weird groups. What would you do with the ACC's 17 teams? Keep the original eight teams together of course. Which 5 of these ACC teams would you exclude: Louisville, Florida St, Miami, Virginia Tech, Boston College, Notre Dame, Pittsburgh, Georgia Tech or Syracuse???? You could put two of them, perhaps Notre Dame and Boston College, in the new Big East Conference with the other Catholic schools and Butler.