Yeah, I know we haven't seen it yet, but based on what we do know, here's some things I'll bet Apple missed that I'd like to see ASAP.
- Unified mailbox as an option: This works great in OS X. I sure am getting tired of checking 3 email accounts with hundreds of extra finger swipes every day. Even an icon to get me to any inbox I want to see would be an improvement. Some people don't want this. A simple software switch would be fine.
- Louder speakerphone: I have no idea why this as been such a problem since day 1. The volume of this phone is just not loud enough in a noisy environment. Maybe this is a hardware thing, maybe it's software. Whatever. Just fix this!
- Getting to Bluetooth and location manager: These settings are just buried too deep. How about a switch in the top level of settings? Once again, save me all that tapping.
- Consistency of app settings: Sometimes they appear in settings, sometimes within the app. I shouldn't have to scrounge around trying to guess which app works which way.
- Moving icons around on the desktop: Have you ever tried to organize icons by type, or popularity? Gee whiz, what a nightmare. Maybe this could be done by dragging apps in iTunes, or some easy method on the phone itself would be even better. As it is now, it's like one of those old plastic puzzles where you had to get things in order. Every drag of an icon on the iPhone often has unexpected or at least unwanted results. This is not one of those 'it just works' things on the iPhone.