I think Barcelona achieved a good success by eliminating Napoli. This year, they are in the race for second place in the league together with Girona. I don't know who will win this race, but I think what is more important for Barcelona than La Liga is to win the Champions League. They will be extra motivated for the Champions League and want to beat the other match. Real Madrid, on the other hand, will most likely finish the season as the leader without any surprise losses.
Barcelona has a good chance of finishing in the runner-up position in La Liga, they can definitely overtake Girona position in the remaining matches ahead, while Real Madrid is very close to winning the trophy at the end of the season. Barcelona success in eliminating Napoli is a sign that Xavi squad should be taken into account by any team in the Champions League. If Barcelona is not troubled by a storm of player injuries, they have a chance to show a different performance in the Champions League and go further in there.