I don't think Wisconsin is a great team.
Good yes, great no. They have yet to play OSU, IU, Maryland or MSU and one of their games was a loss to Rutgers.
As far as Michigan, yesterday may have been one of those 'rally 'round the flag' games that teams have when they lose a player. Back in '86, Minnesota was hit with a giant scandal and lost most of their starters mid season.
The first team to play them after it blew up was IU. Minny went out with a bunch of reserves and walk ons (they almost forfeited the game instead) and almost beat IU's *ss.
(The game is chronicled in Season on the Brink if anyone's interested)
Shortly though, the losses began to be felt by Minny and I think we beat them in the return match by 40. Michigan will feel the loss of their best player going forward. There's no way around it.