But its really hard to keep everyone happy over next few years
Apparently Busquets would be their first choice, and rightly so. He is their most proven and most experience players.
Pedri is the new golden boy of Spain, the most impressive midfielder in Euro last summer.
Gavi would be their future CM. 17 year old and Spain international, 43 appearances for Barca this season. Huge talent.
And Nico too, another young CM who is equally as good in passing and dribbling.
Then they have De Jong situation, who is currently a better player perhaps, but actually looks similar to their other talented youngsters - their dribbling, passing, tackling stats are mostly identical/comparable.
If I am Xavi, I would absolutely wants to build my future team with Pedro, Gavi, Nico, maybe at most get another strong DM to replace Busquets in future. De Jong would be their good stop gap option for 2-3 years or so, but its not a must. If those youngsters are ready to play for Spain national team, I see no reason why they couldn't start more games for Barca (as they already did this season). Its like, selling the likes of Kanchelski, Ince, Hughes to promote the likes of Beckham, Scholes, Butt to their first team.