Already made a post on this.
Diaby's a crock, as is Wilshere, as is Rosicky. Coquelin's a kid, Ramsey has a hell of a lot to prove.
If we have to rely on any of them for a long period of time then we have problems. One of those players started on the weekend, and will do so unless we bring someone else in. Sahin should push Diaby to the bench, but then we're still one injury away from it again. M'Vila would mean we have 4 steady players for the 3 midfield spots. we need this kind of competition to avoid running players into the ground, like we did with Song and Arteta last season.
We will play between 50-60 games, the likes of Coquelin and Ramsey will get plenty of minutes. Diaby and Rosicky will be in and out as their injury history dictates, nothing will change there. Both should be nothing more than backups. I don't expect anything from Jack this season.
I'm tired of people pointing merely to number of bodies we have as evidence of depth. judge the squad on the number of "quality and reliable" players we have. How many years of the same rubbish do we need to suffer before people get it? 10, 15, more?