New way of taking Screenshots is not convinient. On my HTC 8X I get around 50 unintentional screenshots everyday. Power button+volume button is simply to easy and the old way was much better.
Not sure about other windows phones, but try to unlock this one with one hand point finger and you will see what I mean. The buttons are close to each other. Not to mention taking the phone out of the pocket. I have this phone for more than two years, so it is about how I hold it.