Nothing. I don't want anything new. I'm happy with the current feature set my phone currently has. What I desperately want from iOS 7 is a renewed focus on stability and Not Sucking. There's been a significant amount of additional functionality brought in over the last few releases, but it feels like in terms of stability it's not improved anywhere near as quickly.
Apple Maps is the first time I've ever had a "what the fuck were they thinking" moment on my iPhone. On my 5, it's really easy to accidentally switch it into 3D mode while zooming, which slows the phone to a crawl if you've got an iffy network connection. Like 30 seconds between screen updates. Just absolutely awful.
I want to be able to turn existing stuff off in Settings. I don't need a Spotlight home screen to the left, I don't want the ugly notification centre that I accidentally trigger and never use, and neither will I ever touch Newsstand or Stocks or Weather or Siri. How hard can it be to present a list of on/off switches - some of them exist already for parental controls.
I think iOS 4.x was the best iOS. I'd probably stay there too if apps didn't start requiring iOS5+. About the only thing I like in iOS5 is the weather app.