I guess Xavi is the happiest person in La Liga because he got what he wanted to get with his team where they know him as a legend and he is coaching Barcelona for the first time his coach in Europa and top teams, Barcelona is in a financial situation in which they can't spend money like Real Madrid and this definitely could affect the results of Barcelona but in the end, Barcelona won the title.
But in the next season, I think Real Madrid can buy better players to have a closer race with Barcelona for the title.
i don't think Barcelona are still in a bad financial state, they were still able to bring multiple players and not for that cheap, it doesn't look like they are having troubles financially at all.