My issue with 5 at the back is removing a vastly superior misfielder for a 3rd cb who many would argue shouldnt even be in the squad.
Your weakening your team to do it.
Hoepfully the tactical shift will outweigh the worse of starting 11
Yeah just gotta stop looking at individual names and look at team balance and finding a system that works best for everyone.
Start from the back, Maguire is our captain and our best CB, but lacks pace desperately. Means you need to cover both sides with pace. Lindelof is too soft to be one of 2 main CB's, but the right of a back 3 is fine and he's fast enough to cover for Maguire on one side. Shaw on the other likewise, while his lack of positioning is also less exposed than when he's a LB in a flat back 4. His strength is progressing with the ball through the middle third which he can still do as a LCB, before passing it off and going back. As a pure LB, he gets caught out of positioning, doesn't have the speed or energy to go up and down all day, and has 0 quality on the ball past the middle 3rd of the pitch. So keep him back.
Go to midfield. We just signed Telles who is excellent at holding a wide position and excellent technique at passing it around, while offering good creativity/delivery from the left. This in turn helps Rashford on the left wing as he now has a natural wide left player to overlap/hold width, with Rashford playing his inside forward role. RWB we don't really have the same situation, but Wan Bissaka can offer good solidity from that side and then let's just hope he improves from an on ball perspective... But if we mirrored Telles to the right side, then it would make sense for Greenwood on the right wing, to get a balanced 3-4-3 going.
Centrally of course you need to balance it out. Either we do a 3-5-2 or a 3-4-3. 3-4-3 works best for our front 3 to be in their natural positions (with Cavani rotating for the striker) but then you need 2 good all round midfielders who can offer good ball progression, passing, control but also energy, positioning and stability. Fred/McTominay/Matic and Bruno/Van de Beek are probably the closest to a 2 who would make a partnership there. Pogba only works in a midfield 3 and needs to be most advanced, and even then he just doesn't fit in that well. There isn't a single lineup where he fits in normally. He's just not worth planning around. If we go 3-5-2, then IMO a midfield of Bruno, Van De Beek and Fred behind them balances it out quite nicely. Then your front 2 we have Rashford and Martial, with Greenwood and Cavani rotating in. Cavani an obvious out and out striker, while the other 3 are all inside forward types who would do best in a partnership like that, so it would work.
De Gea
Lindelof Maguire Shaw
Wan Bissaka Fred VdB Telles
Bruno
Rashford Martial
Henderson
Bailly Mengi Tuanzebe
James Mctominay Matic Williams
Pogba
Greenwood Cavani
Or, what I'd like to see as a sort of half long term view starting 11 by getting the best blend of hard workers and talented on ball players in their right positions (Van de beek and Bruno I feel should both be playing in deeper positions compared to right now anyway, to get the best out of them).
Henderson
Tuanzebe Maguire Shaw
Williams Bruno VdB Telles
Greenwood Martial Rashford