I like most of the new flat design but let's be fair those icons are objectively terrible.
http://dribbble.com/shots/1109343-iOS-7-Redesign/attachments...
Agreed, but that's why it's so puzzling that these icons were released in the first place. If they're the easiest to do and redo, they should be the easiest to get right.
Also, the iOS 7 video spoke of their new "harmonious" grid system used to design the icons. So I'm unconvinced that the powers-that-be at Apple believe they need fixing.
This is a beta, after all. Steve Jobs' pedantry about everything being absolutely perfect for a demo may not be Cook's style.