There's no question Roma has been fortunate to be 10-0-0. For example, we have better possession, shots attempted, shots conceded, shots on target, etc. but less points.
But even if they've been fortunate, maybe it's a win instead of a tie here and there so they could still easily be something like 8 wins, 2 ties and no one would complain.
I want to see how they react if they lose more than 1 midfielder at a time. Their midfield is what does it for me. They have great chemistry and work rate, they overwhelm teams in the middle of the field.
But they won't lose anyone to rotation since they have 7 days before games so they are in good position to challenge until the end.