I remember a movie called Mr. Baseball (1992) which starred Tom Selleck as an aging MLB player who is traded to a Japanese team to finish his career. Among the many things he learns from the teams' manager is getting back to the basics of the game. There is one scene where the manager keeps pitching golf balls to Selleck during batting practice, which are nearly impossible to hit. After several days of this, Selleck protests that he has had enough and wants to hit baseballs! The manager replies "That's what I want to hear."
My point is I think one of the main problems with this team IS the coaching but not so much for the game planning and in-game adjustments. I feel this team is not being conditioned/toughened up enough, physically & mentally, to be able to execute the plays they run, even if they(the plays) are not superior to their opponents' plays. If you can't outcoach Belichick, at least have your players outplay his. We can do neither.