#3 Get the best out of Sanchez
In January of 2018, everyone expected the Chilean to be in the blue side of Manchester, only for it to be hijacked by Man United involving Henrikh Mkhitaryan going the other way to the Emirates. The signing of Sanchez sent young talent like Martial and Rashford down the pecking order, with Sanchez occupying the left-wing position.
But ever since his arrival, he has largely unimpressed for the Red Devils, he has played 23 games, scoring 3 goals and assisting 6, which for a player of his calibre is largely underwhelming. In comparison, it looks like Wenger had got the better out of Sanchez than the Special One.
It would benefit more for the team if he started out on the right-wing, which is a position he is familiar with from his Udinese days. If he did play there, then Martial could play in the other wing, allowing for Manchester United to attack in a more fluent way, and also not leave their young talent to warm the bench.