Honestly, fitting him in wouldn’t be any issue. Left sided midfielder in a three, he can be in the inside left channel and Rashford can play one-twos off him as he’s breaking into the box or he can overlap outside Rashford to allow the latter to get inside the box, while the other midfielder (Bruno) stays inside in a central 2 with the cdm.
My biggest fear and frustration is that we have a player here that we clearly want, and we’re doing nothing to attempt to sign him now, as far as I can tell. Why aren’t we negotiating now? It’s like Bruno, why do we assume that the transfer window is when negotiations are allowed to start? We’ll start negotiating once the transfer window opens, it’ll be the usual “player wants to concentrate on the euros” and then we’ll have paid an obscene amount of money on deadline day for a player who can’t join until three weeks into the season and won’t be match fit by then because he hasn’t participated in his old club’s pre-season due to transfer speculation. All of this assumes that nobody else goes in for him.