I would also say the HC is responsible for preparing the team, but I've accepted that you and Deus don't like that explanation. What I will say is, in my opinion, you practice this key play all week and you got a perfect view of the line of scrimmage. That you don't see the obvious illegal formation right in front of you is your bad as a head coach. The original intent of the play was to snap the ball, so you should know that you have to have a legal formation to take advantage of drawing the Pats offsides. If Pagano DID know they were lined up illegally, but bit his tongue because his assumption was that the ball wouldn't be snapped, then it is on both McMahon AND Pagano for a clear miscommunication. I'm not saying the guy should be tied to the stake and burned for it, just saying he's not 100% absolved of the blame.