This signing, if this were to happen, is as much a morale signing as it is a football one. Fingers are still being pointed, people are still upset.
There needs to be a signal sent by management that says "Hey. We get it. We know that you, the buying public, are upset. But our goals to improve our standing still remains true, and this is an example of it."
A young, dynamic player who can be part of the future of this club, with Pogba, Berardi, Morata, Pereyra, hopefully Coman, and whatever young players they bring in over the course of the next 12 months.
This is a move that I think they have to make. They are not in any danger of being in violation of whatever convoluted FFP rules are out there, the sponsorship deal and new TV deal kicks in next season.
They can make this move. They NEED to do this.