The real question is, given the condition club has that 75M for Haaland's buyout: Would you rather invest that money in a CB, Busi-replacement or a CF/Haaland.
All 3 are key positions but which would actually lift the club to the next level?
In Liverpool's case it was clear. They had a great forward line and their midfield was decent enough. What they've lacked was a GK and a quality CB and VVD lifted them to the next level.
Elite CB, elite DM or Haaland? In Barca's case, I would go for Haaland. Messi is gone, Suarez is gone, Griezmann is gone. The first two were a guarantee for goals and assists. Every fucking season. Only one that will come close to Griezmann numbers is Memphis and he is taking penalties and no one was satisfied with the Frenchmans output. Haaland, injuries excluded, is a guarantee to at least come close to Suarez' numbers. Looking at Barca's results: Would a player who is averaging a goal/game (Haaland is above that rate, assists not even mentioned, but let's keep it simple and say Bundesliga is "weaker" than La Liga) make a significant difference? I'd say yes.
Not neglecting that an elite CB for 75M would change Barca's backline for the better or a DM for 75M instead of Busi, but I'd say we can improve in that department without spending that much. We can replace Busi internally without "losing" much and there are some quality CBs available for free that would be an improvement over current options.
Other than that we'll have to wait how winter reinforcements will do. Auba might be an upgrade and could prove to be a reliable scorer. Ferran is not dominant, but contributes to a better output.
Before starting, I think we are assuming presence of funds for transfers.
My question regarding this, is who are the elite CB and DM who will cost 75M+?
For me, I see 3 "as good as it gets" DM replacement of Busquets.
First one is Brozovic, Caqueret & Tonali
The Croatian is free agent, and surely won't cost as much, Caqueret has one more season left and after seeing Bruno leaves for 40M, I think a 20M offer should get him (probably less). Caqueret is my favourite option and talked a lot about him in his thread.
Tonali is the one I might think about for this money, perfect Busi replacement IMO in both offense and defense, tailor made for our style of past decade and is young. But he is a loyal milanista who is unlikely tp push out.
Is the difference on ball between Tonali and Caqueret worth the money? Is the difference in age with Brozovic worth it? Maybe, but I don't see it.
There are other names as well, as Camara from Salzburg but again he won't cost that much.
CB has some big names like Kounde and De Ligt, but I am not sure both were transform our defense tbh. Martinez seems like cheap good fit options.
De Ligt lack of speed and Kounde lack of height are both issues for a super expensive CB.
The position I would actually try to splash 70M if someone is available is Fullback, if someone like Theo could be pursued I would do it, a dream would be TAA even if he smashes record for most expensive defender, but this is just me daydreaming.
I think atm a fullback who isn't exposed on the defense (ala Alves currently) and threat on the offense change the dynamics of the team way too much and allow for such great tactical flexibility, and it is more rare than a good CB or DM.
I see the gap between a Theo and Gaya are more worth it than one between Kounde and Lisandro Martinez.
Obviously, Milan might not be interested in selling especially after just renewing him.