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