Yes she was going deeper especially at big events in 2012 compared to what she's doing this year but competition wasn't tougher because she was ranked higher and was meeting decent player much later in the draw, average rank of player she faced in 2011: 42(46 if you discount YEC), 2012: 54, 2013: 46. Her record vs Top10 is much more reviling stat and in 2012 she was abysmal with 3-7 record, this year she is 5-4 and impressive 13-5(7-3 before USO) in 2011
Service games held doesn't determined how good is your serve because you can have tons of BPs that you gifted with DFs\UEs that you had to save in order to hold. First service win % is more telling story and if look at this stats she has dropped her level as expected but her numbers weren't impressive in first place, same goes for her 2nd serve win %, also Petra wasn't good returner at all and not just this year like you trying to state and that's why i gave all those stats
We'll just have to grossly agree to disagree (and you noticed, I'm not bringing in noted experts, who support my contention). Cause I'm puzzled by you.
1)Petra had a very good 2nd serve held % in 2011. Many so called experts (who I won't name, but certainly can), thought she had arguably the 2nd best 2nd serve in tennis, and the 2nd or third best serve in the WTA overall. It started to decline in 2012, and got abysmal (of course) in 2013.
2) Petra has lost the action/work she used to have on her serve that brought back short reply's, setting up easy winners for her. This was one of the key attributes of Petra's serve than many people didn't notice. Very few women in the WTA have serves that could do that.
3) Petra has lost 10-12 mph off of her Flat serve (and even intermediate/hybrid ones), compared to 2011, and parts of 2012. This is particularly important, when Petra trying to serve down the middle in the AD court (especially when the returner is leaning, hedging towards the outside), and when serving out wide in the Deuce court.
4) Petra has lost the reliability on her Flat serve up the middle in the Ad court, mind you it's speed. These are all big things, declines that can affect a player immeasurably.
5) Currently she lacks the confidence, due to all these things.
Lastly, why would you bring up Petra's draw the way you did? No matter who she played early, Petra was beating top ranked players as she went deep into tournaments. Now Petra rarely gets to play them at all. I'm puzzled again.
I repeat. Very few WTA players have good, consistent serves.
Bottom Line is: Petra was one of the few women in the WTA that actually had a good, reliable serve (especially when needed to get her out of a Jam). Lisicki's was always too inconsistent. And Sam's was always overrated. Sharapova's started to get better and more consistent in 2012. But they weren't many.
Nonetheless, Petra's was considered equal to or better; slightly behind Sam's at worst (and I know you're going to tell me, Sam's wasn't that good), by most legitimate observers.
Remember what Petra used to do on Match points or tough situations (unless you didn't see, know or remember), like at 2011 Wimbledon or the YEC. She could serve 4 easy points in a row, or come down from an 0-40 deficit against a quality opponent in tight, pressure situations, with titles at stake (Azarenka and Sam in this case), off of great serving. How is/was she not a good server? How many women in the WTA could do that? Certainly not Azarenka, Aga or Li Na, etc.? Boy, what losing does to some peoples memories here.
As far as her ROS: As I stated earlier, Petra's numbers were never going to be in the top 3 like Masha, Serena or Azarenka near 50% (Petra was usually in the top 10, but in the low forties, high thirties percentages), cause she took many chances overall, and would always lose some stinkers, dragging down her overall average. However, if you look at the tournaments, Petra won (particularly in 2011), when she was playing well, her BP% during those tournaments were usually higher,and she could break you when she buckled down. Many experts were even saying at the time, "when playing well/she wants, Kvitova had the best ROS", if not the overall best in 2011. Now whether you believe those exact sentiments or not, it amplifies the point that Petra had a more than better than average ROS.
I find this whole discussion amusing, regarding Petra's serve and ROS: It's all in the hands. Petra has great hands, and ability to control the direction and action of the ball. So all of a sudden she never had this ability (especially when playing well)?
Plus, Petra was never "GOATRA/KVITTY GOAT", with out the ability to smother an opponent on serve, ROS and Ground strokes. That's what she was known for. And what made her "Unplayable" in so many peoples mind. But OK. SMH
PS: It's not all about Statistics (though Petra does well in many/most of them). This is the eye/witness/will/Physics/comparison test. And I find it ironic, that you essentially said 'Statistics can deceive' on Petra's Serve % stats, but you you're entire argument is based off stats and rankings. Which one is it?