Of course, whether the new coach will succeed in bringing big changes can happen or not. But what we know is that Hansi Flick is a caretaker who is quite experienced in formulating strategies and that will help him enough to bring Barcelona the title. Competition in Laliga will probably be tighter if Girona is able to maintain their good performance this season.
Real Madrid, Atletico Madrid and Girona are the only opposing club that seems to be hurdles for Barcelona next season, perhaps La Liga is going to be really interesting and competitive. Barcelona new coach, Hansi Flick did better with Bayern Munich although things didn't end well for him. Moving to Barcelona means more opportunities for him and he's one of the sincere coaches that will live up to the expectations of the fans. Barcelona trusts him to deliver an excellent job for the club which I'm pretty sure he will without any atom of hesitation or doubt.
I don't see Girona and Atletico Madrid as threats to Barcelona because last season, Girona was leading Barcelona with a huge gap but before the season ended Barcelona was able to meet up with Girona and even claimed the second spot in the league table ahead of Girona and even same thing happened to Atletico Madrid because they were also topping Barcelona but at a point Barcelona took challenge and over took Atletico Madrid so the only threat Barcelona has is Real Madrid if not Barcelona still has a very good team that can win the La Liga.
Hansi Flick will try his possible best to make sure that things works out for him at Barcelona so that what happened to him at Bayern Munich won't repeat itself again now that he is managing Barcelona. The expectations of fans are very high and all they look up to is having a very different experience with Hansi Flick.