There are things I like, such as Do Not Disturb which works great and shared Photostreams; and things I do not like, such as Maps, which are a disaster here in Tokyo, Wifi connections to hotspots only work 25% of the time if that, battery life is half what it once was, the phone crashes often when swiping on a notification, having a seperate app just for Podcasts is odd to me, the music app doesn't allow swipe to delete songs with iTunes match, some songs refuse to play and lock up the music app, opening camera app from home screen is PAINFULLY slow forget snapping the quick pick before it goes away! I also notice the auto brightness is wacked, I love how my iPhone thinks 100% brightness is a great idea in the pitch black as it burns my eyes when laying in bed to read a quick text!
Apple seems to be in the mode of give and take away with poor QA. They give some really nice features or feature concepts, but often they are clumsy and seem half baked or incomplete. Many bugs and they break of remove functions for unknown reasons.
It is also time for an UI upgrade. It is looking dated (IMHO) and so freaking rigid. I mean do I really need to go into an app and select here and there to lower brightness or turn on Do Not Disturb? It is time for shortcuts to most used functions NATIVE in the OS.