I understand what you are saying but that is only because you guys must not try to do so because I have no stick skills at all. Anyone who isn't destroying man to man defense just isn't trying to IMO. Hell, simply take your HB and motion him out to the twin WR side and then hot route him to an out. Every time you get man defense this is a sure thing... EVERY TIME! If your HB is fast, say 95 or faster, there is a good chance this will be a TD from anywhere on the field. Its a quick hitter so hope they blitz even.
On defense call the 5-2 blitz or 3-4 pinch blitz and use the LB presnap move in audible. Then set the controller down on the ground. Trust me, its not my stick skills that make this defense broken in any ways. I think that the CPU should start to at least attack the edges and outside like any non moron would in the event that the defense is sending all its LBs up the gut every time.
I am not trying to claim to be good at this game. Hell, I am slow and bad with a controller which is proved night in and night out in my Halo 3 abilities. But regardless, running the same plays over and over should not be an option on the hardest level.