lomekian
Essays are my thing
Also speaks volumes about Arteta not trusting Holding or Sokratis he rather playing full back as extra center back
No, it means that Arteta values the tactical options on the ball having a left footer in that position brings (a la Mari), and that he wants the wide centre halves to be able to push onto the flanks in possession and be able to cover the wing backs defensively.
Holding, as illustrated in previous games is cover for Luiz in the central role, whose job is to hold position more, distribute safely, and be the primary defensive clearer in the box.
Sokratis has no left foot at all, and craps himself on that side.