I don't think Barcelona have the strength of moving around in transfer window because of their financial situation now, even before the starting of the season it should be better Barcelona to agree to just stay behind real Madrid because they can stand it, second place is for them the earlier the believe it better for them, Real Madrid are currently the most strongest teams all over the world not Laliga alone, and they are fit to play and win any of the competition without any fear. Among all the leagues, I think only home league required a consistent performance to be able to maintain it, and already they are built in that.
Even though they are currently hit by a financial crisis, Barcelona must not be afraid to continue preparing themselves to compete again in La Liga. I think the current Barcelona squad is still quite competitive and it is Flick's job to unite them. It must be admitted that Real Madrid is getting stronger, but they must not feel proud because other teams might be able to conquer them. Barcelona and Atletico Madrid remain serious threats and I really hope that these two teams are able to compete closely with El Real.