Too much white. I wish I could use the darker private browsing color scheme as the normal color scheme. White might be better if I'm browsing in bright sunlight, but that's like never. iOS6 Safari's top was a just a nice, black status bar, and bottom was a darker gray row of buttons.
Doesn't support immediate toolbar hiding when navigating to a web page. You have to manually scroll a bit to get the top bar to shrink and bottom to fall off. iOS6 Safari respected a programmatic scroll that web devs could use to ensure that a web page's initial view showed as much content as possible.
Still terrible about reloading pages after you've been on another tab or in another app. I understand how RAM works. But it's like they put 0 effort into making this a decent user experience. If you can't cache to "disk" when you need that memory back, at least restore my previous scroll position after you reload the page.
Can't upload PNGs, only JPGs. Though this bug was present in iOS6 Safari too.