maybe i shouldn't have said impossible. When i played the guy, my defenders had about 3 plays where they had two hands on the ball but didn't come up with the pick. You really need the computer to allow your defenders make plays when you get the opportunity, becuase like you said, it is hard to stop a really good player using snugs flip.
I agree with not being able to move multiple players around. To some degree madden limits this because your line will move back to their original gaps when you switch off and the LBs and DBs will do their little pre snap shifting animations.
i still argue that if you run a base defense with no LB shifting, no lineman reblitzing. the O-Line does a great job of blocking. Even in 6 vs 5 situations the line will do decent job of blocking. Like i said before, until the fix blitz effectiveness and man/flat coverage, some degree of "nano" blitzing is needed to get fast pressure. and still cover the field.
I just played a guy last night who used NE's playbook. he ran a good offense and pulled the snugs flip play on third down. I let him run it 2 or three more times with out nano-ing blitzing him but he started using it as a crutch so I took it away from him.
funny thing is he knew that nano-ing was the only way to stop it so he let it go and immediately switched his gameplan. he ran the two HB shotgun formation and hot routed the backs to block. Voila! We now have a chess match! He stopped running a cheese offense and i ran a more conventional defense. My point is that an experienced player can counter any cheese/nano whatever. the tools are available in madden 10.
in the end the score was 10 - 7, but just my luck, i got disconnected from the network before the 4th quarter started. mutual respect was displayed i added the guy to my friend list.