Another alternative would be six 12 team conferences
ACC - Miami, FSU, Clemson, NC, NCState, Virginia, Va Tech, WF, Duke, Boston College, Syracuse, South Carolina
SEC - Tennessee, Alabama, Georgia, Georgia Tech, Auburn, Vandy, MissSt., Ole Miss, Florida, LSU, Tulane, UCF
SWC - Texas, Texas Tech, A&M, Baylor, Arkansas, Oklahoma, OK St., TCU, Kansas, Kansas St., Houston, SMU
PAC - USC, UCLA, Arizona, Arizona St., California, Stanford, Washington, Wash St., Oregon, Oregon St., Utah, San Diego St.
BIG - Ohio St, Michigan, Michigan St, Wisconsin, Rutgers, Iowa, Iowa State, Minnesota, Illinois, Indiana, Purdue, Penn State
Mid- America: BYU, Colorado. West Virginia, Louisville, Pittsburgh, Maryland, Notre Dame, Missouri, Cincinnati, Nebraska, Kentucky, Northwestern
I am sure I missed someone.Would reduce travel for non-revenue sports and more natural rivalries