Agree with you on the fact that la Liga this season is not easy to predict, the outcome and the permutations of who will lead or win the title at this point is not clear and I believe that is the same thing with a lot of leagues at this moment. Girona, Real Madrid, athletic club and Barcelona are currently the top four teams at the table at the moment, this four teams have been consistent in making ways for themselves this season, I'm seeing it that it is a bit difficult for atletico Madrid to break into the top four, though it might happen between now to the end of the season but at this moment it will be a bit difficult for them.
There was indeed a slight shift this week like Girona who lost 2 points and Bilbao entered the top 4, regarding Atletico Madrid, I believe they still have a big chance to finish in the top 4 and they still have the same points it's just that they haven't played their 20th match yet. Overall, Atletico Madrid's performance was no better than Bilbao but there is no guarantee that Bilbao will continue to play well until the end of the season.