When compared to the current squad with last season, it is not much different, Atletico Madrid has its own advantages in terms of winning the title, the coach they have typically uses a defensive strategy, many big clubs are overwhelmed with Siemon's strategy, it is still too early to analyze the title race this season, because Usually in the second half of the season it is only seen who has the chance to win the league title, but I think Atletico Madrid is still in the trend of fighting for the top 3 position.
It is true. too soon to make predictions at this time. because sometimes every season there are always unexpected surprises. and even who will fight for seats in the top 3 we can't fully predict. although if you look at the previous history then it is true what you say. that Atletico Madrid, Barcelona and Real Madrid are the ones who have a big chance there in the top 3. looks like we have to see first their live match at the beginning of the season.
Predicting about winner is surely not possible as we have 38 rounds and many ups and downs can happen in this process with injuries and many other factors are going to be created problems for few teams and giving advantages to others are also in line. With current strength any result is possible, and we can expect any challenger could be at front even Barcelona is having best squad in La Liga with the investment of millions but no one can give guarantee for win of title because this is just going to happen in ground with the play of these players.
Real Madrid is also very good, and Atlético Madrid can also create problems for anyone in any round is on card always just wait until end of first half then we can talk about who is going to win and who is going to stay at top four is possible.