Her nose wouldn't have changed so much with just lower jaw surgery. Are you having second thoughts about not getting bimax? I don't blame you. The first surgeon I consulted with recommended lower jaw advancement only, and I knew that was a bad idea, so I met with another surgeon who said that my upper jaw is severely recessed too.
Again, sometimes just moving the lower jaw changes the perception of the nose because it is now in proportion to a normally proportioned jaw/chin.
As for second thoughts, those don't enter into the picture - I'm pretty convinced I don't need it because my midface is actually not retrusive or recessed. The cephalometric measurements indicate that I'm pretty much spot on.
I'm trying to find more examples of lower jaw advancement only other than HTK on JSB. There is that girl Suzie from Eastern Europe, but those are the only two cases I was able to find. If this is what I think it is then that would make three.
As for "going against their philosophy" - if you believe that then I would seriously question if AG are merely using one tool for every single problem that comes their way. That would seem irresponsible to me, so I wouldn't give that much credence.
EDIT: here's that girl Susie I was talking about. Notice how her upper lip has changed from BSSO + genioplasty only. If she didn't explicitly mention that she did not have upper jaw surgery (which she wished she had) then I would have assumed automatically she had an AG-style CCW rotation.
Before:
http://i56.tinypic.com/5ju0aq.jpgAfter:
http://i54.tinypic.com/2gt9i4i.jpg