I agree he needs to go, but he also needs to see the season out and be there short term. He can then be replaced in the summer.
He needs to be fit for Amorim to play him as left wing back, Mazaroui on the right, De Ligt, Yoro, Martinez the back three I'd think.
Neither Dalot or Mazaroui are suitable to play as a proper left back.
Just going back to this, we enter yet another 1st team, squad, let go period for yet another manager.
It would appear that Amorim is an advocate of a back three (which I'm quite chuffed about as so am I, I think it's great way to play attacking structured football), which means we need fit wing backs and way fewer 'wide forwards' that we've compiled since the club became obsessed with playing 4 2 3 1.
Anyway, out of the current squad playing in his preferred 3 4 3 formation, this is how I'd see the line up;
__________________________________________________Onana
_______________________________Yoro_______________De Ligt___________Martinez_________
__________Mazaroui______________________Ugarte___________________Mainoo____________________________Left Wing Back (Required)
_______Fernandes (at a push, but new required)_________________________________Garnacho___________________________
_________________________________________Hojlund(but additional No.9 required)______________________________
Of that line up, we need a new striker and someone to play off the right. I don't think Fernandes gets in anymore, and there won't be a 'Number 10' role for him anyway. He becomes squad or leaves.
The rest, of the established squad players so not including current up an comers (like Collyer, Wheatley etc.), would be largely get rid;
Casemiro - get rid end of season.
Eriksen - get rid end of season.
Rashford - get rid.
Lindelof- get rid.
Dalot- get rid.
Zirkzee - get rid.
Maguire - keep for squad.
Mount - get rid.
Antony -
possibly squad, but probably get rid.
Shaw - get rid.
Malacia - get rid.
Amad - squad.
Pretty damning.