Dier is a hider. Some people only see the obvious mistakes that happen when players are active (Sanchez slipping for example, or Romero making a dumb challenge). But being passive to a fault is often an even bigger mistake.
It’s like thinking a goalkeeper that stays on his line for 10 breakaways never makes a mistake compared to a sweeper keeper who saves 9 breakaways from through balls before they even happen and fucks up once for a goal. Meanwhile, the keeper on his line gives up 7 goals in that same scenario but people blame the defense instead of the passive goalkeeper.
The amount of times dier backed off 20 yards and we conceded last year was so glaringly obvious that I can’t take the opinion seriously of anyone that still rates him.
The problem seems to be a misunderstanding. I haven't seen anyone in about 2 years say they rate Dier. No one is saying we ought to extend his contract and make him a Spurs man for life. And, for myself, I literally just said he isn't good enough to start for a top 4 club and only has a role because we don't have 4 CBs better than him under contract.
CBs under contract in descending order of confidence by successive Professional Football Managers Who Have Won Major Trophies™:
Romero
Dier [This is the problem - how high he is]
*Lenglet [Not under contract but may be likely]
Sanchez
Tanganga
Rodon
Switching to a 4 member back line, assuming we need 5 CBs in the squad, we can dump Rodon if we sign Lenglet. If we secure van de Ven, we sell Sanchez - this looks to be the step the club is working on.
If we sign another player capable of playing a role in a top PL squad in Ange's opinion (Tapsoba), we have 2 options:
A: Sell Dier, keep Tanganga. I don't like this option because Dier doesn't want to leave which makes it very difficult to pull off in the last year of his contract, and it puts us in the position of having to try and sell Tanganga next season in the exact same situation except Tanganga won't have played much.
Romero, Mickey, Tapsoba, Lenglet, Tanganga
B: Keep Dier and let the contract expire. Benefit from his presence in the dressing room, but as 3rd or 4th CB and no Europe he isn't playing much. Loan Tanganga out somewhere where he can play and build some sort of value to sell him next summer.
Romero, Mickey, Tapsoba, Lenglet, Dier
C: Don't sign Lenglet, sign Tosin instead. Keep Dier and loan Tanganga because we can't have Romero as the only experienced CB in the room.
Romero, Mickey, Tapsoba, Dier, Tosin
C is probably my favorite option, but I think we'll end up with B.