Your cephs are very USEFUL. They reveal very strong and wide bone structure to the mandible and good profile projection. That is to say, your face isn't recessed, your mandible isn't narrow or short.
However, they also reveal very 'flat' mandibular and occlusal planes where upshot of that is shortness to the middle '1/3rd'. Short MIDFACE.
Your cephs also reveal what NOT to do. I would avoid isolated attempts to lengthen the lower '1/3rd' (or even widen) as that could make your mid 1/3 look even shorter.
Theoretically, if you got bi-max, it would be in the direction of clockwise rotatation, not CCW for more elongation to the middle section and to increase angle of inclination of mandibular plane.
Practically speaking though, has a max fax ever told you it would be difficult to elongate the part where you have the shortness?