Of course, looking at Real Madrid's current strength, it can be predicted that they will be able to defend the Laliga title next season, especially since Barcelona is currently unstable, plus with a new coach, of course Barcelona needs to adapt to a new coach, and this takes time. So as you said, maybe next season no team will be able to compete with Real Madrid, especially in the race for the Laliga trophy.
Currently, there is nothing wrong with the squad. The current players are what the team still need to defend their La Liga and Champions league title next season. No one to be removed and not even one to bring in unless they want to have a replacement for some of the players because of injuries or any future casualties.
In the meantime, Vinicius Jr and Bellingham are all doing great in the tournaments going on (Copa America and Euro 2024). They are the two players who are the top in receiving the Ballon D Or. I want to believe that if they if Real Madrid can defend their titles, they will continue to remain the best team in the world.
Real Madrid squad is already full. I think they don't do anything now. I think they should just be waiting for the season to kick off because, as it is now, there is now any team in the La Liga that can compete with them again because they have a full squad already, like Manchester City in the Premier League, but for the Champions League, I think the only team that can challenge Real Madrid is Manchester City since they also have a full and strong squad like this, but any other team that is in Real Madrid back, especially in the La Liga competition, I believe they will still get the title next season again.