He's probably putting all his energy in the super secret iWatch project. This could be good news as far as that initiative. He'll be leading that team with laser focus now.No this has nothing to do with iOS 7
If he were ill or passed away that'd be national news, so I'm assuming that's no the case.That doesn't make much sense either. Even if he weren't working in the US he still works for Apple. That's not a reason to remove him from the US page IMO
According to rumors Mansfield was working on the iWatch wearable device, in some capacity, after Tim brought him back.
Maybe this means that the device is completed or at least nearing completion, and Tim is allowing him to leave now?