It is a mess in Madison for sure. McIntosh, the Athletic Director, felt that the old school smashmouth type of football was not going to cut it anymore. Chryst made that very easy by taking a major crap on the recruiting bed. Fickell was the best coach available and I felt he had a better ceiling than Leonhard.
Tressel came along for the ride. I think the biggest difference between the two (although your take is very accurate) is the use of the Linebackers. Leonhard's use of the linebackers was genius at times. He would mix it up in such a way that the offense would be taken off guard. That would require, however, a good Defensive Line. Unfortunately, I don't think Wisconsin's Defensive Line is very good. There were times where the D line wasn't good with Leonhard and he was able to take his Linebackers and fill the gaps. I don't see that With Tressel.
With that said, I think the defensive backs are good, but either too green or just not able to step up. Of course, it would help if Wisconsin would win the Time of Possession -- something that was a staple of the Ground and Pound philosophy.
So Tressel's lack of having good defensive games may be a result of being on the field too long. That is directly attributed to Longo's offense. There have been flashes of being good, but they haven't been able to string it together, yet. I feel a little better with what I have seen this year vs. last year, though.
Let's see how they do against Purdon't this weekend. The line is -13.5. Hopefully they are able to put up some big numbers. If they do, then my pessimism may be curbed... a little.