Control Center was introduced with iOS 7 in 2013, since then, it has benefited from minor visual tweaks and the recent inclusion of a Night Shift toggle with iOS 9.3. In future updates, it would be great to see Control Center gain more hardware and system toggles, along with the ability for users to customise which toggles they require and where they are positioned. An enhanced Control Center could also add support for 3D Touch for additional options and introduce a new system-wide dark mode.
I don't typically publish iOS concepts on MacStories, but Sam Beckett's latest video is so close to my idea for a customizable Control Center (see last year), I just couldn't resist. Tasteful, well researched, and with some great ideas for integrating 3D Touch, too.