Damara : I forgot to add, I can still do Kegels.

The muscle *is* cut and damaged, but it heals, and fairly quickly. After that, dilation trains it to relax and allow penetration (and some cis women have problems with that muscle clenching up in similar ways, by the way). Oh, and I was orgasmic in my sleep 3 weeks post-op, although it took a few months to figure out how to push the right buttons on purpose; at this point, even though I know it's impossible, it feels like I have *way* more nerves concentrated in that area than I did before. I have no idea what the stats on sensitivity and orgasm are, since I don't know if anyone's ever collected that data scientifically, but anecdotally I only know of one woman who is not orgasmic post-GRS and she strongly regrets surgery and didn't realize that she wouldn't have a penis afterward (?!) so I don't think she's typical.
Personally, I spent years agonizing that I wasn't "really trans" because my story didn't match the traditional one, but I've ended up concluding that for all intents and purposes it doesn't matter - as you put it, you're not cis if you worry about stuff like this. The label is intended to describe us, not circumscribe us. Not to mention that, honestly, it sounds like you're worried the results of surgery won't live up to your expectations. That's perfectly reasonable and understandable, and I bet some cis women having plastic surgery wonder the same thing.