If Barcelona does not change the strategy they use then Real Madrid will no longer have a rival who can defeat Real Madrid's strength. Barcelona must change all the strategies they use and try to buy another player with a young age and almost the same skills as Mbappe. In this way there will be a chance for Barcelona to win the match against Real Madrid. Hopefully Hansi Flick finds the right strategy that Barcelona can use in next season's matches which will come soon.
The change of the Barcelona coach this season will of course automatically make the strategy and also the Barcelona game scheme will change next season, so far Xavi and Hansi Flick of course have different playing styles and have characteristics that are also very different between the two, to be able to compete with Madrid of course will not only be based on changes in game strategies that will be applied, But also changes and also squad improvements are the most important factors that Barcelona must do, currently Madrid has brought many stars to their squad and made them one of the clubs that are indeed favored to be able to dominate La Liga again, while Barcelona is currently busy with discussions about some of their players who may leave in the summer.
Barcelona under the coaching of Hansi flick will of course start a new era and we know how Hansi flick currently needs high resources to build Barcelona, so indeed Barcelona who has high expectations should be able to provide these resources to support all Hansi flick performance, although I am a little doubtful that Barcelona will be able to do so, I personally think that next season La Liga will be more dominated by Madrid and maybe Barcelona will be no different from when handled by Xavi due to their poor finances.