I can't imagine her playing that bad to lose to Voracova and Torro-Flor on grass like that with that serve of hers. She must be hampered. Take into account how many weeks she has already missed this year.
I only wonder how many more alarm clocks she needs to finally take a break for good and rest up.
Thus said, she can still be lucky to have won a couple of matches here and there because her draws in 2013 have been a complete joke. If she was only at 50% she could have already been ranked in the Top 30 due to pure luck alone, but in this state she is only embarrassing herself.
There are cases when a rotator cuff (hypothetically speaking in this case) only needs rest and no surgery, it depends on severity of it. From what I see rest in her case doesn't do it. If I remember correctly she was injured last year.
The first time last year I haven't seen her with a taped shoulder, she beat Wozniacki with ease and went on winning Tashkent + reaching Linz SF in a row. Then she had to pull out of Luxembourg Q again with a sore shoulder.
I'm also pretty sure that shoulder injury might be one of the reasons, why her timing seems to be completely off in 90% of her baseline shots.
She has so much game, but she doesn't belong on a tennis court right now.