Would I be a candidate for a revision genioplasty or a neck lift? (photo)

When I was young my jaw was recessed during orthodontic work. I ended up having a genioplasty. While it went well, my doctor took the conservative route, I remember him saying he was going to do this, & I don't know why, but he only moved me 5 mm. Now I am still extremely unhappy with my appearance. I have always continued to have submental fullness under my chin, & it is not fat. It is extra skin, due to my small jaws that didn’t develop forward nor width wise, and potentially weak muscle tissue as well due to TMJ disorder I had in the past. It is extremely noticeable when I talk even from the front, and I hate my side profile. I am now 36 years old, 15 years later, & I want the metal hardware removed for many reasons. I am wondering if I'm going through with the procedure if I might as well have a revision genioplasty done as well. Is it MUCH riskier than just having the hardware out alone? Is it true that a revision genioplasty is much riskier than the 1st? I included pics w/ teeth apart & together as I look slightly more recessed here. Do you think I would benefit from having my chin moved a few more mm, would it lengthen my jawline enough to stretch out some of this soft tissue/ double chin I have? Or would my chin have to be moved so much in order to make a difference that it would be too projected then? Would I be better off with a neck lift? Or is there nothing to be done? (Not interested in filler or implants). I appreciate any insight!