Not as lopsided as you think, at least in the 21 crossover games.
14 home games for East teams.
7 home games for West teams.
11 wins for the East teams.
10 wins for the West teams.
Northwestern 2-1 vs. East (wins vs. Rutgers and MSU; loss vs. Michigan)
Iowa 2-1 vs. East (wins vs. Maryland and Indiana; loss vs. PSU)
Purdue 2-1 vs. East (wins vs. OSU and Indiana; loss vs. MSU)
Nebraska 1-2 vs. East (win vs. MSU; losses vs. Michigan and OSU)
Wisconsin 1-2 vs. East (win vs. Rutgers; losses vs. PSU and Michigan)
Minnesota 1-2 vs. East (win vs. Indiana; losses to OSU and Maryland)
Illinois 1-2 vs. East (win vs. Rutgers; losses to Maryland and PSU)
Next year the roles are reversed: 14 of the 21 crossover games are home games for West teams.
14 home games for East teams.
7 home games for West teams.
11 wins for the East teams.
10 wins for the West teams.
Northwestern 2-1 vs. East (wins vs. Rutgers and MSU; loss vs. Michigan)
Iowa 2-1 vs. East (wins vs. Maryland and Indiana; loss vs. PSU)
Purdue 2-1 vs. East (wins vs. OSU and Indiana; loss vs. MSU)
Nebraska 1-2 vs. East (win vs. MSU; losses vs. Michigan and OSU)
Wisconsin 1-2 vs. East (win vs. Rutgers; losses vs. PSU and Michigan)
Minnesota 1-2 vs. East (win vs. Indiana; losses to OSU and Maryland)
Illinois 1-2 vs. East (win vs. Rutgers; losses to Maryland and PSU)
Next year the roles are reversed: 14 of the 21 crossover games are home games for West teams.