Same scenario as in the OP except the ACC adds Navy instead of UConn in order to accommodate new full member Notre Dame.

Any takes on how realistic this scenario is?

ACC
East: Duke, NC State, North Carolina, Wake Forest
North: Boston College, Notre Dame, Pittsburgh, Syracuse
South: Clemson, Florida State, Georgia Tech, Miami
West: Louisville, Navy, Virginia, Virginia Tech

Protected crossovers: Navy/Notre Dame, North Carolina/Virginia

Big Ten
East: Maryland, Ohio State, Penn State, Rutgers
North: Iowa, Minnesota, Northwestern, Wisconsin
South: Indiana, Michigan, Michigan State, Purdue
West: Illinois, Kansas, Missouri, Nebraska

Protected crossovers: Illinois/Northwestern, Michigan/Ohio State

Pac-16
East: Houston, TCU, Texas, Texas Tech
North: Oregon, Oregon State, Washington, Washington State
South: Arizona, Arizona State, Colorado, Utah
West: California, Stanford, UCLA, USC

Protected crossovers: none

SEC
East: Florida, Georgia, LSU, South Carolina
North: Kentucky, Tennessee, Vanderbilt, West Virginia
South: Alabama, Auburn, Mississippi State, Ole Miss
West: Arkansas, Oklahoma, Oklahoma State, Texas A&M

Protected crossovers: Alabama/Tennessee, Auburn/Georgia

The 3 remaining Big 12 members keep the conference name and absorb 9 of the 10 remaining AAC schools to make 12. UConn goes independent in football and moves its non-football sports back to the Big East.

Big 12
East: Central Florida, Cincinnati, East Carolina, Memphis, South Florida, Temple
West: Baylor, Iowa State, Kansas State, SMU, Tulane, Tulsa

The other G# conferences are not directly affected by the realignment.