Well i agree with you for the favorites i think that o most all favorites will win ,but we always see a surprise in each round so i wonder what that will be. The only match i dont know what the outcome will be is between Brighton and Man Utd,honestly anything can happen here so will avoid it.
It would be better to avoid this match for betting because as you said, anything can happen in this match.
Manchester United is still the favorite but of course we also know the problems they have now. On the other hand, Brighton is the club with the best goal productivity at the moment as they have scored 12 goals even 1 goal more than Manchester City which if we look at the average ratio in 1 match they can score 3 goals at the beginning of this season.
The previous match also for those who were predicted to be difficult against Newcastle they succeeded with a 3-1 score and this is clearly a big threat should be for Manchester United whose current condition is that they have a pretty bad defense.
So it would be better to just watch without betting on this match.