Sicario2 We never used to play these games to quite this extent. 1,022 total minutes this season for 9 goals, if he'd actually been wasting league minutes not scoring then he'd have been pumping out two goals a game in every other competition.
Reality is Arteta's often been bringing him on after 70 or more minutes as a defensive sub in the past couple of months. If you want him scoring goals at that point then you're not aligned with the manager.