A few interesting nuggets on Leonhard as I've digged in a little more on him:
-As far as his time in the NFL goes, Rex Ryan is the guy who really shaped him. That's who he broke into the league as a starter with in Baltimore, then he followed him to the Jets where he started for several years on top defenses, and once he got away from Ryan he was never really a consistent starter again. Throw in his time under Joseph and if I had to guess his schematic philosophy will be very similar to those two, which means unpredictable blitzes and simulated pressures from all angles out of a base 3-4.
-During his time at Wisconsin he sent several guys to the NFL who weren't elite talents but have developed into very steady, disciplined players who have played better than their pure physical talent would indicate, most are hybrid 3-4 LB types:
Nick Herbig, Leo Chenal, Andrew Van Ginkel, Keeanu Benton and Zack Baun
Outside of the Watt's Wisconsin has had almost no notable defensive players in the NFL, I'm not sure what it means exactly but my guess is that Leonhard has an eye for developing average talents into disciplined contributors who play beyond their talent.