Xavi in Barcelona was very impressive and I couldn't expect to see Barcelona winning the La Liga title when he started working there because Xavi is not experienced as other coaches. However, in last season Barcelona couldn't play in the champions league but I think in the next season when they are racing with other teams like Real Madrid and Machester City, they can even have the chance to win the champions league title if we see the same performance from this team in the next season.
If Barcelona's performance is still the same as before next season, it might only be possible for Barcelona to win La Liga again next season. Meanwhile, to win the Champions League next season, of course Barcelona needs to improve its performance next season better than the previous one. Because last season's failure in the Champions League is an example that is still very close for Barcelona to see it and try to make improvements before they go into next season.
Even if it's impossible for barcelona to win UCL with the current performance. There shall be a lot of improvements must be made by the club. I meant barcelnoa's level is still under other team's level from the different league. It's very hard to accept that, but it's the truth.
The result against arsenal has proven it. Barcelona needs to prove its capability to face serie a club as well once it's gonna face ac milan very soon. Barcelona was performing so good against real madrid but i don't know why barcelona's performance has been dropped so hard once it was facing another club from different league. Barcelona needs to strengthen its defensive line. I have no problem with attacking lines, but the defensive line is still having a lot of weakness.
Xavi shall have solved this as soon as possible.