Football is a game where anything is possible. Barcelona is capable to do more than they did in the previous season. But It is possible that their performances will be less impressive in the upcoming season if they cannot able to maintain their high level of performance from the previous one.
Even in the previous season Barcelona prove they have waht it takes to make a difference only that they did not showcase the exceptionality early enough so it's possible this season they will get that fixed and make a difference far much better then they did last season. If you look at their squad they still have good players who are going to help them get the kind of results they desire to get in the new season. Their performance this in the new season will be better than last season, their coach would have examined their performance and seek to improve it because they do need to do better if they want better in the new season. The coach also wants to win more trophies throughout his stay at Barcelona so let's expect better from them in the new season.