I'm thinking in you POD arrangement, Wisc has the easiest pod - really only NW as a competitor. I think the west pod is the toughest - 3 good competitive teams (assumption is Nebraska will be back to being Nebraska of pre-2002 or even the Nebraska of Bo and BCs best years) while the other 2 pods have 2 competitive teams.
Out of curiousity, I looked at the final Sagarin ratings from last year:
East Pod: Ohio State (92.33), Penn State (86.27), Maryland (72.67), Rutgers (55.46) - Average = 76.68
North Pod: Michigan (88.80), Michigan State (78.14), Minnesota (76.14), Illinois (59.37) - Average = 75.61
Central Pod: Wisconsin (81.12), Northwestern (78.37), Purdue (75.43), Indiana (70.74) - Average = 76.42
West Pod: Nebraska (73.01), Oklahoma (90.99), Iowa (86.60), Kansas (64.31) - Average = 78.73
Obviously that is only one year and NW was on one of their "up" years. But I don't think it's as far off as it might look at first - going forward.
The West would probably be pretty tough most years. Nebraska will (hopefully) go up but Iowa could slip back some. But about the only thing you could do to balance them out on a historical basis would be to flop Iowa and Northwestern. Which probably works but isn't quite as clean.