You also have one of the best defenses in the league with the steel curtain 2.0. I would move pass rush sliders down a tad, especially if you are user controlling linemen. I play with my pass rush set at 47 or 48 I think. Have to check when I get home.
But you have to play other QB's. Trust me, Brees and Manning will get rid of the ball a lot faster than ELI. Rivers will too. I've played a game or two against him. I've been adjusting my human end of these sliders since demo. But I can honestly say after 3 or 4 weeks of testing I was content enough to start my franchise and have enjoyed every single game.
The other thing on the human end (to be successful) is to mix up play calling. The CPU AI is a lot smarter in regards to picking up trends this year. I like the fact that you have to out think your opponent for once on the play calling end.