Barcelona are unbeaten in their last 7 matches in La Liga. However, they have lost two crucial matches against Real Madrid and Athletic Bilbao. However, in La Liga they are quite a consistent team. Since Xavi's main goal at the moment is to stabilize the team and qualify for the Champions League, I would say Xavi has been successful so far. The team's performance has improved, now they can beat any strong opponent in the future only if they can maintain the continuity.
Too little too late. There is only hope of getting into some of the European competitions but this year has been a disaster not only on the field and even not only with relatively small teams. on the positive side, at least they may start re-purposing the team and getting ready for a successful next year of competition as this one is lost. Also, the mismanagement that recently was exposed in the courts of justice may hinder morale.