I dont know if we can arrive at some really hard ground taking into account this game of Brazil, i mean they played against the most weak and last national team in the whole conference, this Chile is very bad, so i dont know if a 3-0 against the worst team in their home is a good way to meassure the Ancelotti job.
Im gonna wait a little bit more before making some statements
You might expect Brazil to win by more than 5 goals against Chile?
Yes, they should, because Brazil had many chances and only scored 3 goals.
That's a great achievement by Ancelotti.

I can't judge now in the preliminary round, it's better to see next year how the World Cup competition starts and how he will react with his tactics.