Barcelona is just a few points ahead of their rival; real Madrid .with that their probability of winning the la Liga title is quite narrowed. Considering their proximity to winning the Europa league, u quite can't tell that they will be able to conquer the likes of Manchester United, Arsenal, and others. Barcelona is currently having a defensive challenge, which is more like a house with a shaking foundation, and up till now they haven't made any step toward fixing it, instead, they keep adding aging players to the defensive line, which is quite unhealthy to the tax ahead.
Barcelona are trying to improve the foundation step by step, they have almost finished a good job after getting some new workers in the transfer market yesterday. Barcelona's biggest failure this season has been elimination from the Champions League, while in the Europa League they haven't been able to fully pamper their feet due to a big ordeal from Manchester United.
If for example Barcelona is able to beat Manchester United, Barcelona chances are still not fully open. There are still other challenges that will await Xavi's troops in the next round. The strength of the foundation must be increased immediately before the storm comes, Xavi must immediately find a good strategy to fend off one by one the storms that will approach them.
It wasn't such a bad idea to try to build a fresh team to play with good team work without relying on Messi to carry the team. Indeed Barcelona's biggest flop this season was getting eliminated from the champions league, good thing they have another chance in the Europa league to rewrite the wrongs this season. If they can win the Europa league it could erase their failure in the champions league from the minds of the public.