Like him as a professional and think he's neat and tidy, but we need to have players who are genuinely fighting for starting positions and not simply happy to be here. When he plays left-back, we have to change our shape of play, and he's generally had the safety of playing with Silva ahead of him, a luxury that he won't have next year, or Sane who added width and speed.
Is he strong enough to start at the base? Is he good enough to start as an attacking midfielder? Is he good enough to start as a left-back? I cannot answer any of those questions with a yes, and unless we're talking about a goalkeeper, we can no longer afford to keep a squad place for anyone, let alone a utility player, no matter how reliable he is. Perhaps we should send him to Arsenal on loan for the season and see what Arteta can make of his reliability.