Jon in your earlier post on your two divisions the numbers from 1945 to the present supported your proposal and also support this proposal. His numbers are almost identical to those if you use the last 65 years. Switching Wisconsin and Illinois I don't think is a great idea, I am sure every institution will have to give up something.
I went trolling around some websites on this subject earlier today. There wasn't much conjecture, but it was starting. Some suggestions were purely geographic and others more in line with Delaney's criteria. So far yours and this writers are the best ideas I have read.
I think many Wisconsin fans want to play Nebraska every year. The Alvarez connection.
Doug Lesmerises, The Plain Dealer
Big Ten Black
Ohio State, 102-25 (.803) -- 230-74-5 (.752)
Michigan, 81-43 (.653) -- 222-80-5 (.731)
Wisconsin, 86-43 (.667) -- 170-129-4 (.568)* Jon has Illinois
Michigan State, 60-62 (.492) -- 153-141-4 (.520)
Purdue, 67-57 (.540) -- 133-156-4 (.461)
Indiana, 39-78 (.333) -- 118-167-3 (.415)
Totals 435-308 (.585) -- 1026-747-25 (.578)
Big Ten Blue
Nebraska, 84-44 (.656) -- 242-71-1 (.772)
Penn State, 77-46 (.626) --218-86-1 (.716)
Iowa, 80-45 (.640) -- 182-116-5 (.609)
Minnesota, 62-62 (.500) -- 129-162-2 (.444)
Illinois, 45-73 (.381) -- 124-162-5 (.435)*Jon has Wisconsin
Northwestern, 61-61 (.500) -- 116-172-3 (.404)
Totals 409-331 (.553) -- 1011-769-17 (.567)