I have no problem with the "simple", "flat", "clean" design direction that Apple is taking. I think it could look very nice and updated. I applaud this aspect of their decisions.
My concern is more about color choices, some of the app icon image designs, and some other various UI choices as they exist now.
To be fair, I am not a developer, and have not used iOS 7 in person. I'm basing my opinion on the screenshots provided by others.
My concern for iOS 7 app icon color choices is specifically about the pinks, purples, and other super-bright pastel colors (but mostly the pinks and purples and reddish-oranges) that are in the following App icons: iTunes Store, Music, Game Center, Podcasts, and to a lesser degree: Photos, Reminders, Passbook, Newsstand, and Contacts.
I don't care for the purple in the iOS 6 Podcasts app either, but would be more okay with it if it were closer to the dark muted (low saturation) purple found in the new WWDC2013 app icon background color. Anything closer to black or dark blue would be preferable to midrange, bright, or pastel purple. Anything pink would be better if changed closer to black or dark muted (low saturation) red.
I would prefer the bright orangeish-yellow pastel colors to either be dark and muted or to become the midrange of either orange or yellow, but not both (without the pastel).
I would prefer the bright orangish-red pastel colors to either be dark and muted or the midrange of either red or orange, but not both (without the pastel)
The gradients between pink, red, and orangeish-red (found on the Music App) appear like the visual equivelant in music performance of three consecutive notes on a Chromatic Scale played simultaneously, the result of which is often unsettling (because it is in-fact an offset, neither the same nor different enough to become harmonious), like three musicians who can't decide which note to play together. I would prefer they pick either red or orange, but not both, and to make it a solid color without the gradient between two very similar (yet different) colors. Either a red only gradient, an orange only gradient, or a solid color with no gradient at all. I don't know why they don't just continue to use the orange found in the previous Music app. It was more pleasing than this orangish-red gradient mix they are using now.
My concern for the iOS 7 text and button UI color choices is specifically about the pinks and purples and other super-bright pastel colors (but mostly the pinks and purples) found inside the App UIs for Music, Game Center, and possibly other App UIs I have not yet seen.
My concern for iOS 7 app icon image design (not based on color choice) is specifically about Safari, Game Center, Photos, Newsstand, and to a lesser degree Contacts and Settings.
I tend to prefer monochromatic mixtures of blues and greens with some careful uses of yellow, some oranges, and browns. all with various uses of saturation, and I'm more tolerant of the use of pastels in these shades. I don't like reds, pinks, and purples, in most shades (between orangish yellow and purplish-blue), and am personally just trying to be tolerant of them when they are bright, heavily-saturated, or pastel (even though I don't like it). I usually prefer those colors to be dark, muted (low saturation) closer to black or gray or very deep muted orange, red, or blue, and definitely not pink or purple.
