I also see it like that, one of the reasons Barcelona was eliminated from the Champions League was because they were unable to balance the game when dealing with teams who had the same strength as them. The strength of Manchester United cannot be underestimated even though Barcelona has managed to improve its performance, Manchester United has improved since Ten Hag became coach.
Barcelona strength will be seen when dealing with Manchester United, if the tactics used by Xavi are able to get rid of Manchester United from the Europa League, Barcelona is ready to compete again to win the La Liga and UEL trophies.
Another problem is Injuries.
We know that when they were knocked out of the Champions League their form in the Champions League and La Liga faltered because they lost 4 core players in midfield and defense.
Xavi is good at coaching, but he still can't balance rotations so when their core players don't play Xavi gets overwhelmed and can't perform all out as usual.