Simeone's side are fourth, just two points off the top due to a three-game winless run for defending champions Barca and rivals Madrid claiming just one victory in their last four.
However, the Atleti coach is not taking their title rivals' unconvincing form for granted.
"That's very healthy because it gives alternatives and possibilities to everyone.
"From the World Cup, teams have interpreted that there are other ways of playing - you can improve in attack with a great defence.
"It is very difficult to analyse such a long season in 10 days. We want to be strong match by match. The team has been growing since Vigo [where Atleti last lost to Celta Vigo on September 1].
"We do not have to look elsewhere - we are more consistent ourselves. There are moments of domination and, from there, the individuals are better and there is more quality."