I didn't buy the "Go easy! It's still only beta!" stuff. The changes that happen in beta are along the lines of "Apps no longer crash while activating the radio while audio is playing." not "Complete icon redesign".
However, some of these (Z-Index? What?) should've absolutely been fixed before GM.
The most frustrating part is that Apple fanboys now justify their love for iOS 7 using the exact same arguments they used to dismiss Windows Phone.