Hey girl! I can't answer the questions, but I might be able to add something as someone in the same boat.
I'm not on hrt (yet, fingers crossed) but after some discussion with my partner, looking into things, and taking a long look at what truly causes me dysphoria, I came to the same conclusion you have.
The girls have to go, every time I see them I die a little inside and every time I have to use compression underwear or tape to keep everything smooth I'm reminded my body doesn't match my brain, but I still want to keep the centerpiece, as my spouse and I both want to continue utilizing things. My sex drive has always been low, and I kind of prefer giving pleasure to receiving, so we are confident we can make things work, and since I won't be having dysphoria during intimate moments, I think things should even pick up a bit, especially once I'm on hrt and won't hate my appearance in the mirror.
You are completely valid for only wanting an orchi, or even if you didn't want to do any srs. I know several women who are years into their transition, some of whom have even hit their "transition goals", who don't have plans for full SRS.
A bit too into details: I was always a grower, and once the girls are gone I should be able to keep everything smooth and pleasant down under once I get an orchi, however everyone's bodies are different and that's just one of my personal goals. I can't tell others what works for them or even what they might like. I'm sure you've given it plenty of thought!
Just don't get in your head about what others might think and you'll be much better off.
You got this!
~~lol wrong comment~~