Really? Tell me how this is more clear: http://grab.by/qmAu

I don't know which button state is worse, selected or unselected. I can't read either of them in the iOS7 version.

That's definitely not clearer, but that's because it's a poor design decision by the developer.

Here's a screenshot of Apple's (just-out-of-Beta) Find My iPhone on iCloud.com showing exactly the same scenario but designed properly: https://dl.dropboxusercontent.com/u/709013/Screenshots/fmi-i...

It's much clearer, and in my opinion looks much better than the original toggle shown in the "before" screenshot there.

I think the new (iOS7) design is better simply because the transparent box on the non-selected buttons allow me to see more map.

no it's not , especially when you cant tell the difference between what is a button and what is not a button.