Barcelona won this league and this can be a great achievement for Xavi and his players especially when we know Xavi won the season while didn't have a good financial situation compared to Real Madrid. Barcelona also failed to hire Messi, I think Barcelona will have problems for the next season because they don't have enough good players and they need to hire many players at least they need to hire a forward to have a young alternative for Lewandowski.
Barcelona needs more players , if they fails to hire more players they will have serious challenge in their games. Barcelona not having sufficient players this season, it was not easy for them to concentrate in other competitions that is why they had to put all their focus on laliga which was not even easy for them.