Simply put, simpson is better because he teaches run stopping as a premium, coach kool d-lines have traditionally not be consistently good run stopping teams. Also coach simpson teaches d-line leveraging better, which allowed our d-linemen to be able to transition from run defense to pass rushing quicker. He's a better technician teacher than coach kool, our d-linemen kept having meetings in the opposing backfields.
He's actually enjoying it here, the pro's are overrated, and the talent level he'll be coaching here will continue to go hand in hand with what he's teaching and with coach diaz's scheme.
I said it from the spring that we'd be a better defense overall because we'll be a better run stopping defense cause coach simpson understands an teaches d-line techniqes better, shouts out to coach richt for hiring coach simpson, another great fit.