The issue with iOS 7 is that it's just not good enough. Transparency and blurs, new options draws and changes to icons to me are not worthy of being called a "reboot" — the operating system changes are purely cosmetic and as pointed out, unrefined (by design, who knows). I think the issue is that Apple have trained people to expect a certain high quality end-result, iOS 7 could have been great but misses the mark and not quite the high standard of design I and others have come to expect.
I have no doubt the operating system will get better but adding in eye candy and filters to the camera app isn't revolutionary nor frothworthy either.