Xavi is a very experienced and visionary coach. The players he has fielded this season have impressed us with their performances. Many people said Aubameyang was out of the field for a long time. He won't play well in Barcelona. But he is playing well in almost every match.
The Barcelona team has some minor problems. If Xavi can solve these, Barcelona will be a worthy contender for the title next season. Barcelona's defense is weak, they need a new experienced defender
Actually I predicted that after they managed to beat Real Madrid. 4-0. If they perform stable until the end then the competition for the La Liga title will be more exciting.
I think Barcelona's game is similar to Pep's philosophy of play. They rely on teamwork instead of individuals. At the moment they just need mental stability and team play for next season. Maybe buying some players needs to but today's stock of players is pretty good, maybe they need to prepare a replacement for an ageing player like Pique.