Las Palmas and Cadiz are not tough opponents for Barcelona so I think that Xavi not being able to accompany the team during these two matches will not have a big impact, now Brcelona is in top form with high self-confidence and this will make it easier for them when they meet tough opponents. the quality is still below them.
Xavi will only be able to accompany the team during the E Clasicco, this will be very interesting.
Barcelona has fallen so bad
Financially, YES. If it's about the competition to get la liga trophy and it's not yet. Xavi has used his special skill to push barcelona exceeds their limitations. In result, barcelona's performance was always so amazing lately. Anything can change in matter of weeks.
Things will be worsening for barcelona next season. Club has no money to buy the new player.

With the Barcelona financial issue, La Liga will not be competitive again because Barcelona will not have enough money to boost their squad to challenge Real Madrid for the La Liga title in the coming years. Barcelona might even sell some of their quality players to increase money. Real Madrid will keep on winning the La Liga title until Barcelona is capable of buying quality players that will rival Real Madrid for the title.