Serena used all her big weapons i.e. her serve and some powerful groundstrokes. Sorana did her best but just did not have the game that could trouble Serena.
Sorana seemed quite tearful at the end and understandably it is never nice to lose. But I am sure if someone before the tournament had told her that she would be in a tier 1 final.
I doubt she would have believed it herself so she should take the positives out of this match and aim to achieve at the highest level.
For Serena this is great preparation to help her retain her US Open title. My only concern was that it took a little while for the serve to really start firing. Other than that she played really well and was a worthy winner.