I've played the redskins twice - lost badly once and won once.
Outside of turnovers, the difference in the game was focusing on his run. He will run, run and run some more.
Offense:
Marshall was a his first look but he also has two very capable TE's. He ran some nice passing plays with his backup QB - mostly up the middle. Their offense hinges on the run, just remember that.
Defense:
Initially they couldn't stop the run and then switched to the 4-6 defense in order to combat it. They seem to play very conservative defense and do not blitz - you will be getting a steady dose of zone defenses from them - but will have time to pass the ball.
Special Teams:
I didnt notice anything.
Overall, smart owner who knows how to play and great sim player. Expect a difficult battle.