Apple wasn't forced into signing the MoU, and I only see three "benefits" over Micro USB-B: (1) there is no upside-down, right-side-up problem; (2) the potential for extra data lines when not connecting at the other end to a USB port; (3) Apple's ability to use the proprietary connector to control the accessories market. I am assuming the two connectors have similar dimensions. Acknowledging (1) and (2), based on the exposed contacts, the pictured connector still looks to be a flawed design.
Keep in mind that you can not do anything on USB port that is not part of the standard. If Apple wants to one day implement Thunderbolt or anything else, they could not do so on a USB port.
Without understanding the specifics of how this port is designed, I believe you are over stating the problem with the exposed contacts. It would be easy to design that connector in a manner that would not allow it to short out.
Edited by Wovel - 9/5/12 at 3:00pm