I don't think the relative "goodness" of any offense is going to matter much. If we don't fix the problems on our side of the line, we're not going to be outscoring some of these better-executing offenses no matter what. We MUST get better against the run, and create pressure on the QB, which we have struggled to do through three games.
It's a little ridiculous to have given up 400+ yards of offense in back-to-back games, no matter who you play. Dennard's return will not fix this. It has to get fixed between the ears of about five guys. If it doesn't, Wiscy will roll up 400 yards against us pretty easily, and having to outscore them in a shootout at night in Madison isn't my idea of a great time.
Michigan/Robinson will move the ball on us, so will Illinois, so will Ohio State, so will Michigan State. A lot of offenses may look like "the best offense we've seen all year" if we don't take care of our own business first.