I honestly don't think our records in 2021 or 2022 would have been that different playing in the East or in the West. Winning the East would have been much harder than winning the West but finishing 6-3 or 5-4 with an East division schedule was not significantly harder then achieving that same mark in the West. Just means beating the Rutgers, Michigan State, Indiana and Marylands of the world, all programs we would stack up very well against most years.
For this exercise to work, we need to swap an East team to replace s in the west.
Michigan State or Indiana are the closest, and keeping Michigan State with Michigan, Indiana would move to the west that would be an imbalance n 2021, but basically a wash in 2022 based on their records that year.
Assuming we would have kept Iowa and Wisconsin as protected rivals, that means we would have replaced games with 4 of the following teams each year:
Illinois, Northwestern, Purdue, and Nebraska, Indiana.
2021
Because we played Indiana, our three crossover games give us a record of 2-1 against the west.
We played Ohio State and Maryland going 1-1 for a 3-2 record.
We mythically play Michigan, Penn State, Michigan State, and Rutger's.
The FPI from 2021 Match-ups would be:
MN 9.1 (27) - Michigan 20.7 (4)
MN 9.1 (27) - Penn State 11.8 (17)
MN 9.1 - Michigan State 10.8 (19)
MN 9.1 - Rutgers -4.2 (86)
So that would project a 1-3 at worst, reasonable best case case 3-1 with Michigan being a likely loss, Rutgers a likely win and Michigan State and Penn State being favored in closer games (we beat WI ranked 13th).
So we'd have a best case 6-3 record, worst case 4-5, possible 5-4 record vs our actual 6-3 record.
2022
We went 1-1 vs WI and IA
We played Penn State, Michigan State and Rutgers going 2-1 so 3-2 in actual games.
We Mythically play Michigan, Ohio State, and Mayland
Per 2022 FPI:
MN 11.4 (21) - Ohio State 25.8 (3)
MN 11.4 (21) - Michigan 23.6 (4)
MN 11.4 (21) - Maryland 8.8 (31)
So likely 1-2, although possible 0-3 (similar distance between MN and MD as 2021 between PSI, MSU, and MD.
Brings us to 4-4 in conference. We were 2-2 with the four west teams we did play, so a 50/50 shot we'd have been 5-4 possibly 4-5, but most likely 5-4 which is exactly what we were.
The difference would have likely been 1-2 more losses in 2021 and as likely as not we'd have won the same number of games in 2022 when looking at this hypothetically.