Firstly, I will address SOME (but not all) of your (14) questions most of which have multiple questions within the 14. But will mention that you would need to have some familiarity with basic fundamental geometrical relationships underbelt to 'digest' or relate to information having to do with maxfax relationships.
Secondly, Because I tend to be more inclined towards what your surgeon thinks you should have rather than what you think you should have, I shall address what the surgeon is most likely trying to convey to you (single jaw surgery). For example, because I see nothing about your case that resolves to CCW, either anterior impaction or posterior downgrafting, I consider multiple permutations of questions about CCW NOT applicable to your case and hence MOOT points for me to address. However, since your questions are on the excessive side, (hardly the 'few' you say) there are plenty of them to go around for others to chime in as to the ones I consider not applicable or moot for me to answer.
1: Your surgeon is most likely conveying that your LOWER airway is narrow and that advancing the lower jaw along it's present 'line' or angle of inclination (MPA) will improve both form and function and that adding a genio (most likely a sliding genio that goes both outward and upward) will add to the improvement of both breathing and also help offset the inclinination of the MPA.
Your surgeon is looking at ANGLE RELATIONSHIPS when he tells you your maxilla is not recessed. With reference to ceph photo:
https://ibb.co/BPFrrCC he is looking at the SNA angle (approx 75 deg) which is below norm (82 ± 2°) BUT he's also seeing that that the line from point 'S' to point 'N' is approx 14 deg away from a horizont whereas norms for SNA and SNB angles are based on 7 deg away. So ADJUSTING for that involves adding 7 deg to the SNA bringing it up to 82 deg which is within the norm. He's also looking at the 'line' of your maxilla (points ANS to PNS) which is about 11 deg away from a horizont where point ANS is above point PNS. So moving 'forward' along that angle of inclination would be of NO aesthetic benefit. Another line he's looking at is a vertical that passes through where the base of your nose meets the upper lip and finding that your upper lip is pretty close to where it should be with reference to such a vertical drawn through such a point. He could also be looking at inherent problems with braces used over bridge work of the upper teeth. He's not seeing need for anterior impaction CCW because you DON'T have ANTERIOR gum show and he's not seeing need for posterior downgraft CCW because that would give you MORE posterior gum show than you already have. Basically, he's seeing that he can improve some form and function by SINGLE JAW surgery. In essence, your surgeon is looking at a lot more than your 'thinking your maxilla is recessed' or needs to be rotated.
2: 'IF' my maxilla is recessed... What about IF you could find all the same points, lines, angle inclinations and planes etc. your surgeon is looking at as discussed above. What about that 'IF'? If not, then consider deferring to your surgeon's judgement to leaving the maxilla where it is.
Linear advancement means to advance over one's own 'line'; line defined by point's ANS-PNS and the angle of inclination that line has with reference to a horizont. (This line seen on a ceph is a cross section of a plane called the 'maxillary plane'.) 'Forward' advancement along this line (linear advancement) will have an UNWANTED--as in UNAESTHETIC-- vertical displacement vector in lines with high inclinations away from a horizont and especially so when 'forward' advancement is SIGNIFICANT.
3: Your MPA is on upper range of norm but not overly high. Your maxillary plane (line of maxilla from ANS-PNS) is about 11 degrees in CCW direction away from a horizont and your occlusal (OP) is NOT 'steep'. Those angle relationships don't relay you are candidate for CCW. Not to mention other factors that justify not moving it at all. MPA and advancement over one's MPA can be offset with a sliding genio that has outward horizontal displacement vector and upward vertical displacement vector. MOOT POINT to discuss the rest of the questions in #3 given it does look like your candidacy is limited to single jaw surgery.
4: MOOT point (for me to address). Not applicable when the angle relationships and asssesment resolve to single jaw surgery.
5: If you still have an overbite which looks to be the case, the lower jaw (single jaw surgery) can be advanced to close in on it without brace preparation and/or braces can come later after the surgery.
6: The cause of your rami assymmetry and surgical plan for correction is best asked to your surgeon.
7: MOOT. Not applicable for me to address because the question relates to CCW of upper jaw in a case where I haven't seen candidacy for it.
8: MOOT. Another question about CCW from someone who's not a candidate for CCW.
9. MOOT. Another question about double jaw from candidate for lower jaw only.
10. MOOT. Not applicable for me to address because the question relates to CCW of upper jaw in a case where I haven't seen candidacy for it.
11. MOOT. Not applicable to a candidate who is not having 'significant' BSSO advancement.
12: Not always necessary to remove. Your wisdom teeth are growing straight up. So, your surgeon is probably conveying they won't get in way of BSSO cut.
13: Correction of curve of Spee can be achieved by:
Extrusion of molars
Intrusion of incisors
Combination of both movements
14: The (pink) scan is something the surgeon has targeted to selectively take a closer look at, my guess is it would have something to do with his decision for single jaw surgery and not to cut into the maxilla.
