I am not sure about how much voice surgery changes all of these. Maybe to a degree, another part is probably the size of the larynx and resonance chamber which does not change with a surgery. You can go through the posts in this forum to see if a surgery is something for you. No one here lost the voice. And I am hardly aware of anyone loosing the voice completely. It seems that with CTA there is some risk, with glottoplasty the risk is there only if you do not follow the no speak times. Even then there are good chances that it can be fixed with fresh sutures. I think the most risk with voice surgery seems to be that the voice could sound strained, breathy, hoarse, weak, too high or too low pitched for your appearance or artificial. These factors seem to be minimizable by choosing the right surgeon and the right technique and keeping all the voice rest instructions plus voice therapy once it is advised.