We don't really need him right now. If Iniesta was as good on the left flank as he is in midfield then we could ponder about a masch/sergi - Xavi -Cesc midfield. And I still think that Iniesta is better in midfield than that left channel role.
Ibras had a far far more succesful career than Cesc has, led his teams to more trophies than the emirates cup, yet you still talk about him as if hes an amateur, all cesc hasdone is consistently ead arsenal to top 4 finishes, one semi in the CL and numerour Emirates cup victories.
there are far more reasons to doubt cesc than there is to doubt Ibra.