I have long believed Windows Phone doesn't need a notification center. I haven't missed it since I switched from android on my cellphone and iOS on my iPod; but since a lot of people are aksing for it, I think the best place to put this notification + control center is in the box that appears when you press the volume keys. I mean, it's accesible from anywhere in the OS and provides a clean interface; also, it won't be in your way of anything and, unlike a swipe from the edge of the screen, it's not a hit or miss.
I have worked in some concept on how this would work. When you are listening to music, a little player pops up, right? Well, with my idea, it'd be moved to the bottom of the bar instead of the top; it'd always be there if you swipe down the bar, providing a quick way of playing music. Also, some more other toogles could be add in there, maybe four toogles (cellular, wifi, bluetooth and NFC) and a brightness slider.
I have worked in some concept on how this would work. When you are listening to music, a little player pops up, right? Well, with my idea, it'd be moved to the bottom of the bar instead of the top; it'd always be there if you swipe down the bar, providing a quick way of playing music. Also, some more other toogles could be add in there, maybe four toogles (cellular, wifi, bluetooth and NFC) and a brightness slider.