Mikel Arteta may shake up his Arsenal squad in the upcoming January transfer window. Arsenal are lacking cutting edge and quality strength in depth in the final third. This Arsenal squad flaw was laid bare on Saturday, as Mikel Arteta’s toothless side slumped to a 1-0 defeat against Newcastle United, registering just one shot on target in that match. Leandro Trossard was particularly disappointing, and has not been able to impress consistently at all this season. The Belgian has started regularly in recent weeks, covering for the injured Martin Odegaard. However, Trossard was one of Arsenal’s …