Hmm... on the other hand, he is on a low salary and we can afford to give him more time to sort out his performances. Especially considering our squad depth atm. It will probably take a few years until we can have a big quality squad, that will render guys like Mingueza too crap to even get some minutes. But he still has to get better since this season he has dropped a lot.
Of course but Marmol and Almeida are on even lower wages and Mingueza's contract is expiring in 2023 so we'll have to make a decision about him in summer. Selling him is not a priority but if a good offer arrives then he'll be sold imo.
Free/low-cost changes I'd like to see in defense this season:
Pique (MLS/retirement) out - Christensen in
Lenglet (sold for 20-25m) and Umtiti (hopefully someone takes him for free just to offload his wages) - Marmol
Dest (sold for 25m) - Mazraoui
Mingueza - Azpilicueta
Balde (loan, as Xavi doesn't look to think he's ready) - Gaya (for around 15-20m so Alba gets a serious competition)
We'd clearly still lack a top class CB but I believe we'll spend whatever money we'll have this summer on a striker so will probably have to wait with CB until 2023. Not that Christensen-Araujo would look to terrible though and we'd have a proven veteran leader in Azpi (who could play as a RB or CB, especially when playing with 3 atb), Garcia and Marmol for rotation.