I've been posting on a Wisconsin board for the past month, and Wisconsin is as follows:
Defense:
Solid unit all around, and they feel like their Dline is potentially very good, and most return to this unit. They return both outside LBs, and feel that they are solid. They lost both ILBs, and one will be a 5th yr transfer from Clemson and another new internal starter that they both believe to be solid as well. They feel like their front 7 is the strength of the D. In the secondary, nearly everyone returns. They have a lot of experience returning, but only one guy with elite physical ability - a Safety named Caputo. He will line up anywhere and is legit. The rest of the secondary is supposedly solid due to experience, but not elite physically. Overall, they should have one of the best defenses in the Big10.
Offense:
Their QB is a tall kid who has a nice arm, but he has been very inconsistent with his accuracy. They have virtually no demonstrable talent at WR, save one guy - a tall, kid - McAvoy (will also play a little Safety). Elite athlete, but he's all they got. Their number one RB is legit - Clements - but have question marks after him. They have 2 excellent receiving TEs, tall, big-body white boys who can play. They utilize the TEs and RBs A LOT in the passing game. The Oline is - surprisingly - a big question mark for this team, as they not only lost 3 guys to the league, but also the previous regime did not recruit as well as past regime for the past 2 recruiting cycles AND they have been bitten hard by the injury bug in fall camp all across the Oline.
Their Kicker is excellent and their punter is suspect.
In summary, their D is better than many will expect, especially up front, but their O has several question marks. Both coordinators are good.