Does sliding genioplasty influence lower lip position and shape? Could it be a successful procedure in my case? (Photo)

Hello, I am considering a sliding genioplasty. I have a thin chin pad, and proper occlusion. My face's lower third is of good vertical length in regards to my middle third. My questions: 1) Would I be a good candidate? 2) Does lower lip stay in place after a horizontal advancement, or will it get more support and hang less? 3) The point I marked - does it stay in place? Could an advancement create a soft, pleasing S profile, or will it just make the curve more distinct? Thank you.