Mikel Arteta certainly had to make some tough decisions when it came to players departing Arsenal in last summer’s window. Granit Xhaka’s departure remains controversial to this day, even if Declan Rice has been an outstanding addition in his place. And whilst fans will have probably been fine with watching the likes of Matt Turner, Auston Trusty and Pablo Mari departing for decent fees, there was a lot more division over departures for players like Kieran Tierney and Folarin Balogun. Many thought that both Tierney and Balogun could contribute this season, players who still had a lot of potent…