But seriously, I think a few tiny detail changes to the home screen and Springboard are all Ive needs to do for iOS 7. For example, the bottom (stationary) row of icons are currently set on a translucent glassy OS X dock-like graphic, complete with reflections. I'm getting tired of that. Might be time to either flatten out the UI (on both iOS and OS X) with less of a 3-d perspective effect, and to better delineate the docked icons.
Also, maybe it's time to allow rotation of icons and dock when iPhone is turned to landscape orientation, like on iPad.
And finally, how about adding animation to icons when appropriate? For example, the gears turning in the Settings app when an iOS update is being downloaded. (Settings -> General -> Software update.) Maybe icons could be animated when the app is doing specific tasks or when a notification badge is updated. Of course, this brings up the specter of a screenful of icons all bouncing and grinding simply to get your attention. That would be awful.
Just remember: iOS is great at getting out of your way. It puts as little as possible between you and your "stuff." Adding visual excitement and cosmetic tweaks might interfere with that primary function: to get you to your stuff as quickly as possible. Be careful what you wish for.