I hope it fixes the little UI niggles
iOS 8 was the first release I've ever seen with flaws in the UI, the most noticeable of which was the size of the text on top (time, carrier, battery percentage, etc.) changing font size during certain transitions like zooming the screen occasionally during transitions like landscape to portrait. Say what you want about Steve Jobs, but he would NEVER have let something like that make it into a final release - much less remain from 8.0.2 through 8.4! He might have screamed at the developers and been a giant asshole, but it would have been fixed.