Barcelona's unbeaten streak continues, Xavi is happy, Barcelona is happy, the fans are happy and everyone is happy (especially the gamblers who bet for Barcelona). Of course Barcelona has higher chance of winning the La Liga title this season if it doesn't make mistakes in the rest of the season. But I think it's still possible for them to drop some points unexpectedly against weaker team or maybe against Real Madrid and derby match, so of course they have to try to avoid those mistakes for the rest of the season.
Barcelona's problem now is the lack of midfielders due to injuries to Pedri and Busquets. Xavi will have to try to adapt his players to play in different positions like he did when they beat Cadiz. Balde played as midfielder while Roberto played as right back, but the two switched positions during the match. Pedri is reportedly out until the end of March, that would put Barcelona in trouble.
It's true that injuries can be a major challenge for any team, and Barcelona's recent injuries to Pedri and Busquets are certainly a concern. However, as you mentioned, Xavi has shown the ability to adapt his players to different positions and formations every match they play which can help switch the impact of these injuries and take less damage.
While it's possible for Barcelona to lose some points unexpectedly, the fact that they have maintained an unbeaten streak for a significant period of time is certainly a positive sign for their chances of winning the La Liga title this season. Of course, it's important for them to continue to focus on avoiding mistakes and playing to their strengths and i believe that their second leg match against Manchester United will be a big challenge and will effect their next matches