They are still a young team, which explains their current situation. Barcelona haven't stabilised yet and progressing with such a situation is difficult. Barca fans may feel uncertain about this team, especially if they look at Barca back-line.
Their problem is that they haven't found Pique's replacement. Pique is already 35 years old and his physique has declined. Even Pique always has a hard time facing a striker who can run quickly. I think Xavi should start thinking about the central defender. I think he should be brave to start the rotation,for example by installing Kounde as the starting line up. Because Xavi is carrying a mission of improvement and he deserves to give more playing time to the younger defenders.
Xavi has done great since returning to Barcelona as a coach, he came when the team was pretty bad,and he improve the team my issues with him and Laporta the Barcelona president is the type of players that they brought in, yes they got Lawendowski the polish striker is world class and has improved the team very well since he came, but bringing players like Christensen and Alonso that are slow and not class kind of playing is annoying,how can you replace alba with Alonso? And this is drawing the club backward.