Thanks for the info everyone!
My maxilla was advanced 10mm and my jaw 5mm (was class III) in a previous surgery. Airway space wasn't an issue before, much less now.
I actually want the subsequent setback that comes with CW, given I don't like how advanced my lower third is and the smile is somewhat unnatural.
Maybe my question should have been if these aspects could improve to a certain degree.
Concerns in mind would be a steep jaw angle and more strain on the chin.
Also note, before any procedure, even if I lifted the upper lip all the way up, I couldn't begin to see my gums (in case anyone is wondering how a maxilla could be advanced so much, and result in little to no teeth show).