Purely anecdotal, but how are you comfortable with the real estate the screen offers? I understand it feels amazing in your hand, but it wasn't until I actually picked up a working iPhone 4 that I realized I could read maybe only two message responses from a person I would be having a conversation with.
I'd imagine if they reduced the bezels on the size of the 6 product line, you'd really find the best of both worlds. Both small in the hand, but also enough space to get more screen real estate out of your applications.
For that kind of reading my iPad is right here in my bag. For quickly sending messages, playing music or arguing with Siri, the iPhone 4 or 5 were much easier to hold or pocket.
I'd imagine if they reduced the bezels on the size of the 6 product line, you'd really find the best of both worlds. Both small in the hand, but also enough space to get more screen real estate out of your applications.