If I'm being honest I'll say that I better understand the flaws he was sometimes accused of having at Atletico. His small passing range and action radius means that he often can go missing from a game in terms of personal impact. It's like every time he gets the ball he holds himself to a very small space to operate in. You'll never see him be the 'center' of a transition play the way Iniesta and Roberto often do. Rakitic doesn't all that often but he has the movement and passing range to make up for it. Our play is never suffocated by Rakitic or the other midfielders the way it is with Arda because they make the game open.
I really like Arda's skill and technique which is why it's hard to admit that he often plays like a passenger during our games, sort of like if Pedro were in midfield. He fits in and doesn't make notable errors or anything but he doesn't manage to contribute a lot. Our midfielders don't necessarily need to be dynamic but he's really the antithesis of it. I don't even know if it's an improvable criticism because it's just so innately built into how he plays.
He is very impressive defensively though, puts in a great shift.
It basically boils down to what he said about not liking to run.