So after Barcelona had had so many disastrous seasons, he came, if i am not mistaken, Xabi and convinced the management to go into debt to rebuild the team and it worked, if i am not mistaken, even if partially.
I think he has a good vision although maybe Flick is better
It's actually not Xabi but Xavi, Xabi is Real Madrid current coach while Xavi was Barcelona former coach. Personally, I think Xavi was underrated although I kind of understand that his Barcelona team then wasn't functional as of the Barcelona of now. He laid the foundation for this current Barcelona if I'm not mistaken. He brought players from the La Massia team and promoted them to the senior team, it means that he saw potential in them. Some of the current signings was still Xavi, I think this current coach Flick is actually on Xavi's team but his getting the real talent out of them. Some coaches build but don't know how to continue in using what they've built, I personally think that was the case of Xavi