That screen game is vital to moving LBs/Safeties out of the box. Pop a few screens for positive yardage and those guys start having eyes toward the perimeter, and it creates a more advantageous numbers situation in the box. Like you said, our receivers/TEs were atrocious blockers when screens were called. It also didn't help Martinez having his worst passing percentages on those type of throws.
The other part is that our OL was just flat bad at blocking Inside Zone, but it works off of the screen game and vice versa.
I also think how Wisconsin plays was tailor made for Mills to have the game he did. If they faced more team that could attack them that way, their defense wouldn't look as sterling as it always does imo. Chryst's post game sideline interview showed how relieved he was that the game was over, and it has stuck with me since.