Dunno about that, Shaw might finally return even if he gets injured again. Harry can be move there. Maybe Maz, or even some kid from the academy. For teh roel the team can find solutions, maybe even try a more prgamatic approach that ends with more felxibility from Amorin to not risk evrything to the max till it works. We don't know.
Yet, his character and winner and positive attitude no matter what, it's sthg that it's hard to be replace. And it's not the same thing as resilliance (like Harry navigating a sea of shyte). It's talking to the press after a bad game, after beimng trashed by that same Press, it's to being harsh on himself on public, it's to celebrate your mates plays during games, it's pushing the line to attack when everything is falling even if you have make a mistake, it's that desire to win above all.
That it's hard to replace in a team that lacks those aspects from United teams from the past.
Of course to make it worse, his skills to defend and with the ball, are top of the draw so that makes it even worse and since Amorin needs players to have composure, to take risks attacking and defending with the talent to back that, yes that also it's hard to replace. Yet at least he can find some competent replacement and not making a mess and keep the shape of things. The character stuff? players are born with that edge and will, doesn't look like United right now has much of that in the lockeroom.