Since you revived this thread, no I wasn't joking. Maybe I was baiting/trolling a little bit with the "split fins" comment (although yes, I really do use split fins at the moment). But I really wanted to know if my proposal was reasonable.
In the end, I bought a HOG reg as my primary and put it on a long hose (5' miflex), and I put the Mares Proton (my former primary) on a bungee as my backup instead of the MV. And so, no, I didn't go with the Air2. But if I had, I still would have put my primary reg on a long hose for easy donation.
Nevertheless, I'm still waiting for someone to tell me why, if the MV was an acceptable octopus for an OOA buddy in a rec configuration, it is suddenly a hazard under my chin as my backup in a long hose configuration.