I think they will both be tracking the same attacker to the centre circle, leaving Busquets to defend all by himself. Only problem is Busquets will be in attacking midfield still trying to get back.
I think it would be a great transfer for 20-25m even though he turns 31 this summer.
Simply because I think he would be the best CB at the club by far if he joins and would bring along his leadership too. For three years it's worth it while the club can go for one of the top tier CB talents in 2023 or 2024.
31 yo is not that old for a defender, we desperately need someone who has already reached his peak and has experience next to Araujo. And what I like most about him is that he's not injury prone like Piqu?.