It is the most cluttered area of the team with Xhaka and then Ramsey, Coquelin, Elneny and soon Wilshere all competing to play beside, maybe Cazorla also though I fear he is now dead, Chamberlain also being touted by some as a viable option.
Thing is would hope or expect to see at least 2-3 of them go in the summer so I am not sure we are any clearer who our best midfield is, Xhaka + ????