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.
I think if the current coach is not Xavi probably Barcelona position wouldn't be at 2nd so in my view Xavi is the right coach for Barcelona because as the former player he know the culture of Barcelona and it proven since he arrived on november last year he has successfully improved Barcelona performance and next season too Barcelona under him looks promising so with the current squad i think Barcelona ready to competed with Madrid or Atletico for race title for next season
There is no way that Barcelona could have been in second place if the coach was not Xavi. he improve the situation in Barcelona right after he came into the club. it is also really good to see that he is very passionate about this club and he obviously had almost all of his career played in Barcelona. very passionate and determined to improve the situation. just imagine what he could have done actually had Messi in the Barcelona squad. It seems like we basically know what is going to happen in this Season. Barcelona should end in the second position. but they could have given Real Madrid a harder fight. which I obviously expect from them in the next season.