The "after" screenshots don't seem to have anything in common anymore. Some of the apps look like Android, some look like Windows Phone, some look like Palm webOS. The previous iterations at least shared a few button styles and navigation bar styles, but now it seems like everyone has taken the opportunity to reinvent those too. It's certainly ok by me that app developers are taking more liberties in making their app…
Just as with iOSes before it, there will be skilled and unskilled interpretations of the design language.