Illinois - who knows, IMHO, they will be better coached and probably more physical offensively.
Michigan St - will be no better than Rutgers 2020. Not a fan of their coach, Hazelton is a pretty good DC, but they lack experience and perhaps talent in the back 7. Offense may be better than people think, if, like everyone else in the Big Ten, the QB play is better.
Michigan - will be about the same as Penn St was at the end of the year, not when they played Nebraska. The defense has talent, but how will they do under the new DC and what will the new DC want to run defensively. Will they start the true freshman at QB? Oline will be decent, RBs the starter returns, and there is depth.
Northwestern - worse than last year, QB play will be the difference. Defense will be strong, replacing the 2 LBs will be a big challenge. WR is also a position that is questionable.
Minnesota about the same, defense will be suspect as it always is with a PJ Fleck coached team.
Purdue - Not sure what is going on there, revolving door of DCs, I don't think they will be any better, I say the same as 2020.
Ohio State - Doesn't matter, even if they are worse, we aren't in their stratosphere at this point.
Wisconsin - Like Nebraska depends on the QB and also finding the depth at RB they need to run the ball like they like to, Berger can't do it alone . Chryst is taking over playcalling duties and QB coaching, so that is a positive for them. The defense will be pretty stout. Definitely a better record, but production could be similar on average. Psyche could play a factor, Penn St, Notre Dame and Michigan in 3 of the first 4 games, 1-3 and the wheels could fall off, 4-0 and they will win the west going away.
Iowa - Better QB play is imperative. I don't care how he played to end last season, teams will stack the box early and make Petras beat them. Replacing a lot of WR, OLine and Dline talent from last year, while some have playing experience, it isn't the same as being the starter. Also no proven depth behind those guys. Overall, about the same as last year.