Those divisions are kinda awkward, splitting up Indiana/Purdue (though it's fair to point out that those 2 are currently split), USC/Notre Dame, and Northwestern/Illinois.
I would suggest:
West - UCLA, USC, Oregon, Washington, Stanford, Notre Dame
Westish - Kansas, Nebraska, Missouri, Iowa, Minnesota, Wisconsin
Central - Illinois, Northwestern, Indiana, Purdue, Michigan, Michigan State
East - Ohio State, Penn State, Rutgers, Maryland, Virginia, Virginia Tech
This would get the SEC down to 15, which then goes to 24 with ACC/Big 12 teams.