I could never go back to iOS 6 because I like the way iOS 7 works and the features it has, but visually . . .
Comparing those pictures, it seems to me that iOS 7 needs three things to make it great visually:
1) better icons. Not necessarily all glossy and skeuomorphic, just better "flat" icons.
2) Shadows behind those icons and their captions.
3) a better dock. Either a more translucent blur, or maybe a subtle tint.
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For some reason -- and maybe this is a beta thing -- the parallax effect seems much more pronounced when wiggling the phone up and down than it does when wiggling it side to side.
Either way, though, the only time I really notice the parallax effect is when I deliberately wiggle the phone so I can see it. In normal use I don't notice it at all.