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.
Although Barcelona have lost to small teams at the camp Nou and that's really unacceptable they haven’t lost a single away game in the Spanish La Liga since Xavi took over as coach. To think Xavi is achieving this when the club is in its worst economic phase makes it more interesting. It is a common knowledge that Barcelona would have become indestructible by now or would be on the verge of becoming one if Xavi has all he need financially.