A good example is Tweetbot which for previous iOS versions created a really nice app. Lets see what they're able to do from now on.
I look forward to great developers creating new and unique versions of their apps for iOS 7.0, most mockups i've seen lately are almost exactly the same as Apple's updated apps. With time I hope developers create their own improved versions based on Apple's apps and not just copy them.
A good example is Tweetbot which for previous iOS versions created a really nice app. Lets see what they're able to do from now on.
I actually like it when apps conform to the OS's look and feel. Familiarity brings ease of use.
I actually think Android's whatsapp is more superior than apple's.
Plus the thing I want the most is to differentiate between Group chats and individual chats better.
Back on topic your mockup looks good you do any design work on actual apps?