La Liga is the first goal and main target for Xavi in Barcelona and they are not going to lose this chance obviously because they are near to getting the title and their traditional and main competitor Real Madrid is far from them with 12 points difference. Barcelona's second target can Copa del Rey when they have to beat Real Madrid again, but currently, they won't lose the chance to take the title in La Liga.
Barcelona were really unlucky the way they were knocked out of the UCL. They had very serious fixtures in a very difficult time. The fixtures came when all of their defenders were out injured. They deserved to win Inter Milan and they should also have won Bayern. Same thing happened in the Europa league against man united. Take nothing away from Man United but they were lucky Barcelona were not with their complete squad.
As for the league they have put in their best and tried to be consistent even when they had players out injured. They fought a hard fight to be able to give their eternal rivals a 12 points gap.
The copa del rey second leg is the tricky one. A lot of Barca players are getting injured again and they will miss the second leg against Madrid. Madrid might take advantage of that and hurt Barcelona.
Real Madrid is underperforming in LaLiga as they focus more on the Champions League. But not performing so badly as to be relegated from the La Liga, the team has great potential and ability to secure the La Liga title after a poor performance. Because Real and Barcelona are the best teams in La Liga so far.