Tell Apple what you don't like at
Apple - Feedback
(Someone suggested sending an email to
tcook@apple.com but I'm not sure what that would get you...)
The new notification center leaves a lot to be desired. How about a list of the next 5 items on my calendar, whatever and whenever they may be? Is that so hard?
Other than that, I'm starting to get used to iOS 7, I dislike it less than I did when it first came out.