I think Leonard is the safe pick and certainly he is someone they greatly respect as a defensive coach that they didn't want to lose. However, he is the most boring guy to pick too. The offense is stale, they either suck at recruiting offense or suck at coaching them, and they really lack getting athletic guys on offense. So the answer to those problems and righting the ship for the future...is hiring a defensive minded coach?
I guess it will be interesting to see how he does in the coming years. Wisconsin may be defense first and run first....that is fine, but PC was honestly a major failure in the QB/WR department. It has really caught up to them in recent years where good RBs can't even save that trainwreck of an offense.
How much change will happen to the coaching staff going with the in-house guy? How much will Leonard change from what he has been used to being under for years? I guess in a way, you really limit that new vision and mindset just handing the ball to Leonard. At the same time, I don't know if the risk of going outside would be worth the risk. At some point one just has to accept the reality that once expansion comes the Badgers are likely going to get buried into the middle of the pack.