Xavi assessed that Barcelona's defense last season was really problematic because it continued to concede more than 35 goals in the last 4 seasons. That's why his attention on defense has increased this season with Kounde, Crhistensen and Kessie his signing targets. Then Xavi is still not satisfied where Marcos Alonso is the next target to be brought in even though the financial problems they are currently facing have not been resolved.
Barcelona's back line was quite fragile last season, they didn't have players capable of breaking attacks from opposing clubs, so they conceded more than 35 goals, but it seems that wasn't Barcelona's only weakness last season, since Messi's departure. Barcelona seems to have lost their best game, even though the composition of the players was not that far before Messi's departure, Messi's dependence on Barcelona was quite visible after his departure, Xavi had a tough task, rebuilding this club to get back on track
Messi is already at the peak of his career and now he will soon be enjoying retirement so I think after this xavi can talk to messi to become his coaching partner so that it can lighten xavi's burden to form a tough player again, so far there is not the same skill as the former messi legend. there is no other choice but to form a new one because if you buy players it will make your finances swell and will definitely be a problem again.