Wow, I can't imagine giving up dilation, either! I'm only supposed to do it for 15 minutes once a week for the rest of my life, but they VERY strongly tell us not to quit, now.
The most recent studies on menopausal HRT (I have access to medical databases and some training interpreting the results, if that matters) suggest that the biggest risk without progesterone included is uterine cancer, which obviously is not a problem for us or for post-hysterectomy cis women. Progesterone is added to mitigate that risk, and that - specifically, non-bio-identical progesterone - is what raises the breast cancer risk. the studies on HRT which had the scary results were all using E plus artificial progestins. I honestly have no idea whether progesterone would help breast development in someone who's so long post-op in any case... Anyway, the current recommendation is simply that someone (cis or trans) who is over 40 or a smoker should consider one of the safer and easier on the liver methods of HRT - patch, sublingual pills, implants, or injection. I'm on a patch, personally; Vivelle Dot, which is really tiny and designed to be changed twice a week.
I also didn't take AAs before surgery, and now my endo strongly recommends against it, since our T levels are roughly comparable to those of cis women and everyone needs *some* T in their bodies for certain functions like energy and libido.