I like most of the improvements, especially screen recording, smoother scrolling in Safari, the ability to sync People albums from Photos across devices, and the customization of control center.
Here's the few things I don't like:
1. The music widget being removed from control center and pinned at the top of the lock screen, so if I get notifications while listening to music, they go under the music widget instead of going to the top of the screen like iOS 10.
View attachment 719177
2. Notification center being gone, and replaced with "Cover Sheet." If I wanted to look at my lock screen, I'd lock my phone and look at it. I want to see the notification at the top of my phone, not the giant time and date and then my notifications.
3. The app bar under the text field in Messages.
4. No ability to clear all notifications.