If you do, it's not micro-USB anymore. And if you wanted to call it "USB" then you have to get the standard committee to approve it. At that point you'd just have a non-proprietary Apple connector, but it still wouldn't be compatible with any other phones or cables without an adapter. Plus we already have USB A, B, micro-A, micro-B, micro-AB, 5 pin mini-B, 4 pin mini-B, USB 3 A, USB 3 B, and USB 3 micro-B.
They all have problems. USB A would be good, expect it's a perfect rectangle that can't be inserted in either direction. There is no way to tell if you have it right-side-up or not. Some of the later ones, like micro-B, are obviously keyed so they can't be inserted the wrong way, but they still have to be positioned correctly. Plus most of the micro ones are so short they don't feel like they're gripped very well by the device (at least in my limited experience).
FireWire 400 had a great connector. It only went in one way, but it was very easy to figure out which way it went either visually or by feel. The FireWire 800 connector is quite a bit worse. It has a small notch on top so can feel which end is up on the cable, but it's not visually distinct enough.
I think Apple actually came up with a very nice design. I haven't touched one yet (so it could turn out to feel terrible), but it seems well designed.