I think that this season is going to be a season that Atletico Madrid are struggling to keep up while Barcelona and Real Madrid are competing hard for the La Liga title. Because I see nearly zero change about Atletico Madrid now. It is more difficult for them unless they add really qualified players to the team. I don't think Simeone would change his tactics much either.
Atletico Madrid can still enliven the competition for the La Liga title even though Atletico Madrid did not add really quality players and Simeone did not change tactics.
But I still believe that Simeone will provide the best tactics for Atletico Madrid next season in order to compete with the two big teams (Barcelona and Real Madrid) for the title in La Liga.
Atlético Madrid seem to be lagging behind in this race. If they want to be champions, they have to strengthen the squad with very good transfers. The strong squad of Barcelona and Real Madrid can be defeated not only tactically, but also the strong players you will have. Simeone may be a good manager, but football is played by 11 players on the field.