I had my orchiectomy done last December because the spiro was damaging my kidneys. I'm not sorry I had it done, I'm just sorry I didn't have the funds for a full vaginoplasty at the time.
The changes you will experience after an orchiectomy will depend as much on your genetics as on the amount of spironolactone you are taking. My libido actually increased a bit after my operation, I assume this happened because the spiro was depressing the use of all the testosterone in my body. Afterwards, since I stopped taking the spiro, my body's T level went up from what was being produced in my adrenal glands, to the level that a natal female would have.
It's certainly not a defeat, though, it's just a stopgap measure to reduce the amount of meds you are taking. SRS is still an option that can be pursued.
Btw, I had a "radical orchiectomy" done - the incisions are in my abdomen above the penis, not in the scrotum. I paid more to have it done that way so there would be no scar tissue in the scrotal tissues to hinder my SRS at a future date. There's no need to give up hope!
hugs & smiles,
Emelye