Ramsey cannot play in central midfield until he learns common sense. We can't afford to have him wandering around in a free role and exposing our midfield. Especially when he's playing with Xhaka who doesn't have the legs to cover any ground.
Watch the goal again:
http://arsenalist.com/f/2017-18/stok...-1-0-jese.html
Look at the player at the top right at the start of the video - yep the one in front of Lacazette and Welbeck. Yeah that's Ramsey. We end up losing the ball leaving two midfielders on Xhaka, so he dives in to a challenge in desperation because he knows those midfielders will easily pass around him. Our defending was bad too but that whole chance came about because of Ramsey.
That wasn't the first time that happened in the match. I was watching Ramsey and at one point he looked like he completely gave up on midfield to play as a striker. Our defenders couldn't get the ball up the pitch and Ozil had to keep coming deep to pick the ball off of them. It should be the CMs doing that and getting the ball to Ozil in those pockets of space he finds. We're a mess tactically.