In fact, Oregon State and Washington State (historically) would be excellent fits for the MWC lineup.

The Big Ten could expand into the West and offer everyone but OSU and WSU from the PAC and probably help the PAC teams earn a lot more media money every year...and own both sides of the Rose Bowl. Offer Texas, Oklahoma, and Kansas and you could probably convince Notre Dame to join. 

The SEC then takes most of the rest of the ACC and Big 12 and off you go. The Rose Bowl becomes the Big Ten championship game and the Sugar Bowl becomes the SEC championship game. A couple of conference championship rounds with semfinals in Indianapolis and Las Vegas for the Big Ten and in Atlanta and Charlotte for the SEC. The two conference winners play for the national championship.

Big Ten

• EAST: Ohio State, Michigan, Penn State, Michigan State, Indiana 
• ATLANTIC: Notre Dame, Maryland, Rutgers, Syracuse, Boston College
• NORTH: Wisconsin, Minnesota, Northwestern, Illinois, Purdue
• SOUTH: Nebraska, Iowa, Texas, Oklahoma, Kansas 
• PACIFIC: Stanford, Cal, Oregon, Washington, Colorado 
• WEST: USC, UCLA, Arizona, Arizona State, Utah

SEC

• SOUTH: Alabama, Auburn, LSU, Ole Miss, Mississippi State, Texas A&M 
• EAST: Florida, Georgia, Tennessee, South Carolina, Kentucky, Vanderbilt 
• ATLANTIC: North Carolina, Duke, Virginia, Georgia Tech, Pitt, West Virginia
• COASTAL: Florida State, Clemson, Virginia Tech, Louisville, NC State, Miami 
• WEST: Arkansas, Missouri, Texas Tech, TCU, Oklahoma State, Iowa State

That's a great solution. Only cuts out Oregon State, Washington State, Wake Forest, Kansas State, and Baylor. Wish there was a spot for BYU, but not likely.