Kavan, do you think a genio would look strange on her?
Well, I said: 'Perhaps a bit of upward and outward sliding genio might be added.' Key word was 'perhaps'. So, it would be something that MIGHT be added to give more of the look of CCW-r to the lower face in the event the CCW-r to the maxilla could not achieve the extent of rotation needed to decrease the HIGH inclination of the mandibular plane angle. Her chin is recessive in its own right and her MPA has a HIGH inclination.
Keep in mind that pronouncing out the chin point (pog) SOLELY via the BSSO so the chin is no longer recessive and also REDUCING the HIGH MPA will be a DIRECT FUNCTION of the extent of the CCW-r done to the maxilla (lefort). It's also a function of getting the teeth to mesh (bite right). So, let's say, the extent of the CCW-r at maxilla (posterior downgraft + possible impaction) would be 'too much' (for ANY REASON) to be SOLELY depended on to REDUCE the HIGH inclination of the MPA. In THAT case, the surgeon might elect to ADD the sliding genio to assist in the goal of reducing the high MPA.
Hence, it's really not a matter of my thinking it would 'look good'. Something looking good is a function of the displacements that in turn, are functions of all the multiple variables. So, for now, we can say it's a displacement of the chin that could/would look good in the event the CCW-r (and BSSO) alone could not be SOLELY depended on to reduce the high MPA.
Let me put it this way: What can look good (or bad) is WHERE THE POG (chin point) is. So, there is going to be an aesthetically preferable place for the POG point to be. So, it will be a matter of whether or not double jaw surgery ALONE will decrease the MPA enough so the POG point is 'put where it should be put' to look good. If for any reason it can't, the sliding (upward and outward) genio could be used toward that goal.
It's also a matter of it being very common for a genio (even very small ones) to be added to DJS which resolves to the possibility it might be added to the surgical proposal. So, it's something she should be 'braced for' when she consults around and gets surgical proposals.