The native Orbiter has its merits for MDs. Apart from that, I don't see any advantage at the moment. This might change, once interaction other than press is implemented.
One thing the Touch Orbiter should do, is the ability to create a device for itself, i.e. the first time it gets executed, it prompts the user for the Orbiter to use, or, if none of the existing Orbiter devices fits the bill, have the option to create a new Orbiter device.