I too think, that Xhaka - Ramsey is definitely the way to go now. First of all, Xhaka is the only one who offers a long ball = Walcott, Özil and Alexis benefit from it. Ramsey must now stake his claim at midfield, if he is ever to prove himself there. If he cant do it now, we might as well just sell him in the summer. Elneny would be Ramsey-lite solution in case we need to rotate and Coquelin should only be used in case we want to play a very defensive game in big away games or be used as a sub to shore up the midfield.
Unfortunately, im very fucking sure, that Wenger sees Coquelin as first choice midfielder and other 3 will have to pair up with him. Woeful.