Barcelona always did their hardest effort in each season, dude. Sure, the lack of quality players became the biggest problem for Barcelona. Even Xavi was the coach of Barcelona, he couldn't win any trophy because he has no proper squad in the last season. Actually, we can understand if Barcelona failed to win any trophy. Well, the new coach means to have a new strategy. It is very possible that Barcelona to change their strategy but I don't see it will be effective to improve their performance as long as they still have the same squad. Hansi Flick is a German coach, he probably has own strategy and different play stayle. Honestly, I doubt if Barcelona players will easily adapt with Hansi Flick.
Source: tribuna.com
Actually, I don't really know much about Hansi Flick's playing style, but if you refer to the data you have provided, it is likely that it will work quite well if Barcelona can fill in the existing deficiencies by bringing in players who are targeted by Hansi Flick. In that formation there are Kimmich and De Ligt and I am sure the strategy will work well if these two players join Barcelona. Moreover, with gegenpressing which has been directed by Hansi Flick, everything can be resolved.Source: tribuna.com
It's just that we can't have full hope that this will happen and the same problem is still a hot topic of conversation, so I'm pessimistic about the potential signing. The rest is that Hansi Flick has to make use of the existing squad and even if the results are not as expected, at least he can direct his players slowly.