I'm not totally sure. On one hand, there arent many options when it comes to a notification center. You can have it come down from the top, and Android and IFans will complain. Make it come up from the bottom and IFans will think you have no creativity. In my mind, this was a positive move, and more or less the most needed implementation for windows phone. With new features in the works, one that i think will be the best is replying to texts in the notification center, which has been talked about for a long time, and obviously the carousel quick options, but not infinite. Other than that, i think action center is pretty much where it needs to be in my opinion.