Not sure about that I get what you mean but we struggled against there midfield last time, I can see them over running gerrard he still isn't fully adapted to dm role
We're good against teams which keep possession and come forward. We saw that in the recent Everton game, and in the City game which we should have got something out of. We're awful when teams sit back and let us have the ball, as seen against Villa and West Brom.
Arsenal are a team which keeps possession of the ball and likes to attack. Their full backs bomb on, and without Flamini they protect their centre backs poorly. They're susceptible to the break, which is what we're best at.
I think we've also changed how we're playing since Arsenal passed us to death at the Emirates. In that game, we tried to go toe to toe with them in the middle. We're now much more focussed on playing on the break, I imagine due to the pace of our front four and the problem that, at present, our midfielders are not good enough to play possession football.