This is an interesting proposal would place schools into five geographic groups.
SEC stack (45): GA, FL, AL, MS, SC, TN, KY
ACC stack (57): NC, VA, WV, VA, DC, MD, DE, NJ, CT, RI, MA, PA, NY, NH, VT, ME
Big Ten stack (40): OH, IN, MI, IL, WI, MN, IA, ND, SD
Big XII stack (42): LA, TX, AR, OK, KS, NE, NM, CO, WY
Pac-12 stack (33): CA, AZ, UT, NV, OR, WA, ID, MT, HI
Each of these five geographic "stacks" would include three tiers, and teams that finished lowest or highest in their tier would move up or down to another tier.
For example, here's the Big Ten Stack, incorporating all schools in OH, IN, MI, IL, WI, MN, IA, ND, SD.
|Michigan State||Iowa State|
|Bowling Green||Western Michigan|
|Ohio U.||Ball State|
|Pioneer Conference (IA, ND, SD, IL)||Ohio Valley Conference (IN, OH, MI)|
|North Dakota State||Valparaiso|
|South Dakota||Indiana State|
|South Dakota State||Youngstown State|
Seems like a comprehensive, common sense proposal. May be worth a read.