I guess it depends on how much action you want the relfection to do after the real guy leaves. If you just want him to stand there, and cut after the real guy leaves, then you could use split-screen and freeze-frame. Or maybe even reverse.
I worked in Navy Public Affairs in a previous life. Yes, get in touch with the public affairs officer. Emphasize your professionalism and they will give you the same back, I am sure.
I just saw an XL2 for sale right next to a Sony HD camera, for exactly the same price. Am I wrong to thing that this signals a price correction after the holidays?
Perhaps the question might instead be trends and fads. Direct overhead shots have always been possible, and have probably been used since the dawn of cinema (correct me if I'm rwong), but it has been cropping up in a number of films.