I think Barcelona will still be on top at the end of the trip. They are playing better by the week, and Atletico is going downwards.
But unfortunately, it cannot guarantee if Barcelona will defeat Atletico or Real Madrid in the upcoming matches. What you think is your expectation only, it is not what Barcelona to achieve at the end of this season. I hope you don't be too frustrated once you see Barcelona isn't in the first position then. 
Atletico is currently not in their best form, but they have Suarez. That is a force to be reckoned with.
I don't know what you want to express exactly. All people know if Atletico isn't in their best performance lately. However, they are still leading on the table, so it is no doubt if they have the biggest chance to be the winner although not showing their best performance. Regarding Suarez, he is always an amazing striker. All team must consider him and put big attention to him.