I think iOS is on the right path. To me, it honestly feels like 7.1 is the best they've done. Top to bottom. I love it.
What I'd like to see from here? A new pulldown notification system. Learn from Android, that makes sense. Right now it's kinda worthless. Having a giant list of notifications that have to be manually closed even after I've opened the app delivering them is annoying, and it'd be nice if apps that stay persistently open (chat, music) would have an entry up there. Again, think Android.
Combine the "all" and "missed" into one, combine all notifications for a given app, and have them go away once the app has been opened and we'll be good to go.