Coq was amazing today no doubt but let's not go overboard and think we still don't need to buy a world class DM.
At the very least Coq demonstrated he's a capable deputy and should start over Arteta and Flamini any day.
It's hard not to get overboard as the last 3-4 games of Coquelin has been as good as I have seen this year in the PL. Yes, we need to sign a DM but I see no reason why Coq cannot be the main man in that position.
Arsene Wenger, the only football manager that got paid 8 million quid to do nothing but sit on his arse..