That's right, Xavi became an important part of the rise of Barcelona. after the difficulties at the start of the season, Xavi gave a new spirit to the game of Barcelona. that's what led Barcelona to rank 2 at this time.
maybe this season Barcelona is still without a title because it was not Xavi's target after he arrived at Barcelona. but for next season, Barcelona will bring in new players to support Xavi for a trophy.
Looking at the current barca squad I don't think they are ready for the title next season. But the arrival of Xavi in the middle of this season was able to bring a good atmosphere in the team. But I think Barcelona is in time to build or rebuild a squad that can bring back their glory like in previous years.