We are not getting the expected performance from Barcelona because of some weaknesses in defense and midfield. They dropped points against Bayern and Inter in the Champions League due to defensive weaknesses and mistakes. Xavi is more focused on his attack and he has strengthened his attack. But Barcelona's defense is still weak. If the defense is not strong, Barcelona will not be champions of La Liga. Barcelona management will probably focus on strengthening their defense in the winter transfer window.
Barca is in a rotation of players in their defense. they had been strong at the start of the season. but to play consistently, of course, it is impossible for players in the Barca main squad with so many matches.
Barca now has a weakness, and Xavi will of course have to take this into account for the winter transfer window. looking for a formidable defender to become a strong fortress of Barca.