Deerey he had his mind made up on playing this particular formation right from the start and would have shaped the squad the way it is for that very reason.
Only problem is now he’s assembled a squad to play a certain formation which he now finds out doesn’t work, but can’t really deviate from it due to his own recruitment of players.
But that’s the problem – he hasn’t. His system doesn’t need wingers so he’s got that right. He needs wing backs – he didn’t inherit any and didn’t sign any. He needs 3 MFs and finished with 7. Exchange 2 MFs for 2 WBs and he’d have a chance of his system working. Otherwise a back 4 and 4-2 or 3-3 looks to better suit the current squad.