I honestly don't think Cesc is obsessed with being in a number 10-ish role.
We've never heard anything to indicate that from him, for instance I can't recall him announcing his disappointment with last season's lack of goals relative to 09-10.
Cesc in that advanced AM role is Wenger's doing in my opinion, and stems from our lack of a competent backup for the injured Van Persie and Bendtner in 09-10.
My concern is that Cesc is becoming habituated to the narrower responsibilities and lower workrate of that position. He's way too young and to be frank, not devastating enough as a finisher to be put out to pasture in a pseudo-forward role.