I haven't had the surgery yet, either, so maybe my thoughts aren't germane. If not, please disregard and move on.
I used to say that GCS would be the last surgery I would have done, because it's the surgery no one sees, and because my face and voice are things that everyone sees and are therefore more critical.
I had reason, recently, to reconsider. My sister happens to live in the same city where there is a surgeon I feel I can trust, which means I have someone who can assist me, and possibly be available to assist with other surgeries, if I have that surgery done first.
Since realizing this, the idea of GCS has become increasingly attractive. I've never experienced conscious dysphoria over my genitalia; but neither am I attached to it. A vagina, on the other hand, sounds scrumptious. I would love to have one.
I don't think it's about the genitalia, either, really. We're never going to be cis, no matter what we do. All we can do is embrace the woman within. For each of us, that means something individual. Some people never need GCS, and that's fine. I don't feel I "need" GCS, either. But I want it. I know how it will make me feel to look down and see one less thing suggesting I'm male, and one more thing confirming I'm female. No, it isn't necessary; I'll be a woman if I keep the little fellow until the day I die. But I'd rather look down and see him gone.
Wouldn't you?