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.