They are still bad in the Champions League as they got another loss. But in the La Liga, there has been some improvement in their performance. They were really impressive against Sevilla in their last game. If they keep that performance in offense they can start a nice winning streak. But of course they are still not one of the most reliable teams of the league. They need to earn this by being more consistent. Even if they don't manage to beat either Barcelona or Real Madrid, they must be able to stay strong against weaker teams than them.
Not only in the Champions League but this season Atletico are still struggling in the domestic league so I don't expect anything from them for the Champions League.
Griezman's drastic decline in Barcelona's performance still continues at Atletico at this time and Morata's presence is still quite good but this still can't do much.
Currently they are at the bottom of Group B with 3 points although there is a chance for them to qualify for the next round but I am quite skeptical about this.