To me, Barcelona can still get a trophy with their current players; they should put in effort; they can make it up too, although I know that their new coach is going to be a problem, and the problem is that he will introduce new tactics for players, and they have new players that they need to get to know and understand before the league starts, so you are right.
Although I admit that Barcelona is likely to be much stronger this season, with its new players and possibly new tactics, but to get the La Liga title this season, they need even harder efforts. However, Real Madrid is currently a team that is known to be stronger in terms of squad composition than other clubs. And Barcelona must face it, like it or not, Real Madrid will again be Barcelona's obstacle to lifting the trophy this season. Moreover, there is Mbappe in Real Madrid's new lineup, of course they are much more ready, not only in the front line, but Real Madrid's middle and back are very ready. And if you look at the data on paper, Real Madrid has a greater chance of defending the title. However, for the reality, we'll try to see later.
The problem that Barcelona have always faced is that they always don't want to lose their players for sale and prefer to let them run out of contracts without any continuation and indeed that has happened in the last few seasons.
Yes, at least for now, what is being monitored by the market is Rapinha, Joao Felix, and also Vitor Roque. The latest news is that Aston Villa rejected the price offered by Barcelona, which was €60m-€70m each for Raphinha and Joao Felix. Aston Villa felt that the price was too high and because of that, they immediately rejected the price offer. Until now, there have been no further negotiations regarding the player.
For Vitor Roque, Al-Hilal has actually started negotiations with Barcelona, and this could be a good alternative for the club to get income from the sale. At least, Al-Hilal has started approaching the player, but it seems that it will not go smoothly. Roque still wants to stay in the European league, but on the other hand, Barcelona hopes to be able to sell the player this season.
Source: Al Hilal have approached Barça for Vitor Roque