On the plus side, I like the control center at the bottom, and the new notification center is nice. The multitasking WebOS layout seems unnecessary. Also, new camera stuff like HDR. I think they may have tweaked fonts a bit, text seems a tiny bit crisper, but that may just be my imagination.
My biggest prob with it is that it's too damned bright. I mean, burn your eyes at night kinda bright. I know Ives is probably all about the Sun God or whatever, but give me a dark option you fucking skinheaded hippy.
Also, pretty sure iTunes Radio just nailed the coffin lid shut on Pandora.