Well, I don't really understand the game so much, but do you seriously think Maria Sharapova has a B game? Yes, her defense has improved significantly this year, she's a much better mover. But against a ball machine like Azarenka you gotta be aggresive all the time, 'cos she's so explosive. Maria is much more powerful but since Maria can't rely on her movement as much as her groundstrokes, she had to be aggresive, thus making lots of UEs.
I think Maria had a great start to the match. Aggresive, lots of winners, mininal amount of UEs , but there was no way for her to keep that up for two sets.
Good for Victoria for staying calm and fighting for every service game of Maria Sharapova. She kept the pressure on Sharapova for the entire third set, it was really uncharacteristic of Sharapova, showing all sorts of nerves. Victoria got in the head of Sharapova and that alone is a remarkable achievement considering how much of a fighter Maria is.
I have few problems with Maria's game when she plays against Vika. Yes, she has to be aggressive, but she also must try to construct the point. Hard crosscourt hitting against Vika is a horrible decision, that's never gonna work. She never tried to open the court, she only tried to overpower her, that's also how she played against Woz in 2011 IW semifinal and 2010 USO R4. The other problem is her lack of belief, it was obvious in this match, she's one of those players who rarely show emotions. When you're desperate and tentative, the opponent sees it. Maria's excessive celebration after winning the first set was a message to Vika. She was already losing it. The next problem is her terrible footwork, she knows that Vika will hit a deep return on her 2nd serve, she must move back a bit. Her horrible shot selection when she had chances to finish some of the points was also remarkable.
Vika is rock solid, no doubt about that, her defense is excellent, she can be aggressive, she's determined and full of self-confidence. But in this match she gave Sharapova chances, she did, but Maria failed to execute.