My first post, of course it's about something wrong...
iOS7 is polarizing, that is for sure. I feel that the overall look was put above all else, with actual usability being placed second. I've only updated my iPad so far, so this is from that point of view.
One big issue is the overall whiteness of it all. There is very little contrast at times that makes the buttons hard to see and easy to navigate. The keyboard actually got worse with this color scheme. It's just too flat, too bright, too beta-feeling.
And it's the little changes that seem out of place for no reason. Changing Delete to Trash, why? The app switcher is got worse, closing apps now is a longer process. The 3x3 in the folders, there was no reason to do this at all and now makes it harder to use the folders.
Overall I don't really like it. I don't think it improved things at all and is rather just Apple rearranging the table instead of moving forward. If you are going to make such a shift, at least allow users to make some additional tweaks.
One last thing, what is so bad about skeuomorphism? Elements of this actually made iOS6 really pleasing. I mean legal notepads are yellow for a reason, not just because.