Control Center in iOS 7 is one of my favorite new features, I use it all the time to adjust brightness and toggle Airplane Mode. It’s also a great improvement compared to iOS 6, where the same actions could take up to a dozen taps, the toggles and sliders being buried in the Settings app.
While the four bottom app spots are great for quick access to “tool” apps, two are wasted on me since I barely ever need quick access to a calculator and have the Camera app on my home screen, which is good enough for me.
The idea would be to allow the user to choose which apps appear in three of the four bottom spots (since removing the flashlight would mean losing the feature completely, it being only accessible through Control Center). That would be great for weather apps and other “quick-glance” apps that are opened a few times every day but aren’t necessarily worthy of a home screen spot.
To replace an app, the same tap-and-hold interaction from the home screen could be used, allowing the user to choose from a list of apps ordered by most-to-least opened in the last week, for example.