He can’t put himself in as 10, which is the number he wears. Only Arteta can do that. He plays out of position. He was fit enough to be more impactful.
Actually, when he was fit we needed him on the left because Martinelli was just coming back from his knee injury. By the time Martinelli was fully fit, Arteta had shifted to a 4-3-3 so their was no 10. We switched back to a 4-2-3-1 at the end of the season when ESR wasn’t fit and Ødegaard had cemented his place.