Everything will depend on the support of Barcelona management because if they are not able to improve by bringing in several new players then I don't think Hansi Flick will make Barcelona rise.
Xavi is actually also a coach who has good qualities, it was proven when he first arrived that he made quite a lot of positive changes, but the Barcelona management did not provide strong financial support because the Barcelona team was having problems, the same goes for Hansi Flick next season, I think Hansi Flick should be in provide financial support to bring in some new players otherwise I doubt that Hansi Flick will make the team even better.
I believe that we are going to have some trouble with it if we are not careful, we should be as careful as we can get in order to make it work otherwise we are going to have some trouble, obviously a lot of people do not realize that Barcelona fired Xavi after having some good seasons there, he did as well as hoped for, with the financia limitations that they had, and the fact that he was fired should scare Hansi Flick, because he looks like it is not going to do all that well.
I personally believe that we are going to end up with anything better with Flick, and the situation Barcelona is in right now could blow up big time unless they fix it, they may end up getting into a huge trouble if they are not careful and keep spending money.
Barcelona management looks like they were careless in making a decision regarding Xavi, because if we evaluate this decision with full consideration, it is very annoying. Not without reason, Barcelona management took Xavi comments too seriously, I think all coaches would do the same thing if they were in Xavi position. It is very likely that Xavi next successor will also react this condition in the course of his career, because it will not be easy to fulfill all the demands of club officials with financial limitations that have not yet fully recovered. The competition for the trophy next season will be even more competitive, because Madrid as the main competitor still looks quite strong, and will even get stronger.
Barcelona management must act actively in the transfer window, regardless of how to deal with the financial situation, the aim is so that they are not left behind in the race for the La Liga trophy. Mbappe is reportedly getting closer to joining Madrid, even though the season not's starts, we can imagine how far Barcelona will be left behind if they don't improve the depth of their squad. Another concern is the process of adapting players to the new manager strategy, lucky if this stage does not last long. So I think letting Xavi go is the same as taking a bigger risk, regardless of other reasons that we don't know.