I agree with MrMojo about Warnock/Enrique though. Bit like replacing a 22 year old Habib Beye with a 26 year old Stephen Carr. Yes, Carr's used to the Premiership, yes he's solid enough but he'll never be much more than that.
I think Enrique's going to be class though but it all seems to be about the here and now (I think he's a better player now tbh but that's my opinion). I do wonder though why Wenger doesn't replace his young if somewhat raw young stars with solid "proven" Premiership players...