I think they've lacked some steel in the middle of the park for some years now, and you could say the same for the central defence. Still amazing that he unfailingly gets them into the CL every season. But for where we are now, Rafa's a better fit. Because Wenger wouldn't even entertain the thought of managing us for one thing.
Probably since Song left, I think he tried to sort it with Coquelin but he's probably not good enough.
Viera, Petit, Silva, Flamini & Song were all solid though for like nearly 20 year.