If you had asked me this question at the beginning of transition, I would have said that it was the most important thing in the world to me, possibly even more important than the social transition itself. I had severe bodily dysphoria, so much so that I actually attempted freezing my own genitals in ice around age 16, and constantly had (happy) dreams about cutting the damned thing off.
Shockingly, though, transitioning has significantly eased my genital dysphoria. Having smooth skin and hips and a feminine body shape has made it much more bearable, and HRT cutting my sex-drive down to basically nothing has made it such that I really don't think about it that much anymore. (Erections are my primary source of genital dysphoria, so now that I don't have to worry about that AT ALL anymore, it's not as big of a deal.) It still does bother me, mainly just because tucking is a pain in the butt, it severely limits my swimsuit options, interferes with my ability to fully see a girl in the mirror, makes me a bit nervous of being "found out," especially when I'm using the bathroom, and I'm sure if I was actually in a sexual relationship it would be a HUGE deal, but at the moment it's really not something that makes me miserable every day anymore. Most of the time I'm able to ignore it. So SRS has dropped down from being my #1 priority to just being something that I'm hoping that at one point I can get in the future.
My #1 priority now is seeing a girl in the mirror, and being able to just live as a girl without worrying about it anymore. I'll start worrying about SRS again once that's out of the way.