If they were preparing for the champions league they should have atlas defended well not conceding four goals in a single match to a club that was struggling in the beginning of the season. The fact is barcelona under Xavi management has proven to be the best currently in the spanish laliga series this season.
whether without Benzema or not, I think the rotation of players from Madrid does not need to think about a replacement for Benzema. what I see is they lose in the midfield of their game. because the ball is managed well by Barca. Barca has risen and proved to be a surprise. Madrid's bad luck conceded 4 goals.
Actually there are a lot of strikers who have names that shine enough individually at Madrid but their performance is still not possible and so bad that they cannot replace Benzema's role there.
Their schedule is still very tight now and it is very unfortunate if they are still like this because dependence on Benzema will be difficult to anticipate if something unexpected happens to Benzema