First of all welcome to the group.
I personally have not heard of this surgery before. I would think if you expanded it the PWS would expand with it. That would be a good question for Dr. Levitin and Dr. Waner. If you got to the front of this website and click on ask the sergeoun you can post this question to Dr. Levitin.
As of technology get better there might be a better treatment option, but as of right now laser treatment is still the best. I have been having laser treatment for over 18 years now off and on. I started when I was five years old. I agree with you when you said that every day we wish we did not have this PWS, but because I have facial PWS and am a guy it is a lot harder to cover my birthmark. We have to live with our conditions and make the best of what we got. I would not be the person I am today if I never had a birthmark, same goes for you. There is a reason for everything and there is a reason both of us have PWS we just have to find that reason and run with it.
I would like to hear more about your experences with PWS. If you would like to read my story you can read it in the story section or you can read it on my website www.hankspws.com
Talk to you soon.