Le Coq has the best ball 'turnover' and tackling stats, he remains a decent option to have when we're getting overrun in midfield. Such as when we keep losing the ball there, as none of our midfielders except Cazorla can actually retain possession under pressure.
Coquelin/Elneny is ok for shutting the door when we're comfortably up in a game. Ramsey probably offers more penetration than the others but when Giroud isn't holding it up for him there's little point him being in the team. His passing is also relatively shit and he loses the ball way too much for a top level player.
Xhaka's importance is now highlighted with no Cazorla or Wilshere around for the rest of the season. Xhaka/Ramsey should be the pairing to have, if Ramsey can improve those parts of his game. As I don't trust Ramsey anymore, for me it's Xhaka/Coquelin.