One big thing the game highlighted was how much Flamini was missed in the match at Anfield and the home match to Man Utd. Flamini is your key player as there is no one in the squad who can really play that role. Maybe Diaby could if he didnt lurch from injury to injury, and maybe this Kallestrom guy could if he wasnt also injured, but at the moment you would be lost without him. There is noone else with a ball winning, destructive (to the opposition) mentality in your midfield. Even if say Giroud got injured, although it would be a massive blow, you at least have options like Bendtner and Sagbo but there is no one at the moment who can fill Flamini's role. Arteta is not a destructive ball winner, he's a very good footballer, but a creative one, his positional sense and marking skills arent good enough to be a defensive player and he can get caught out (like vs Palace away). The same is true of Wilshire, an accomplished midfielder but not really a pure defensive one.