iOS has been around for over five years now, and in the time between its ’07 reveal (alongside the iPhone) and now, it has changed a lot. Some things, however, have stood the test of time by going unaltered after six major dot iterations. That isn’t necessarily a bad thing; rounded squares for app icons make just as much sense now as they did in ’07, for example. But for other aspects of iOS, the exact opposite can be said.
“Sentry” (known as Sentry_NC on twitter) has posted mock-ups on The Verge’s forums of some major changes he would make to notification center and system alerts. He was author of another post entitled “Rethinking the App Switcher for the iPhone 5″ a couple months ago as well. They are some absolutely fantastic mock-ups, some up to par with what I would expect directly from Apple themselves.