I'd say reversing bone thickening would be hard to do and dangerous. It's a hard situation to resolve and in all honesty it's not likely to happen until we can build living replacement bones for any bone in the human body and then implant them without crippling the person. For instance reworking the entire lower jaw without causing nerve damage, shrinking the rib cage and shoulder span, hands and feet, width of nose base, brow, pelvis. These are the areas which can make a male to female look manly, they also are areas most likely to outright kill or perminantly disable you if you remove the bones or make inscissions big enough to do so.
Women to men has some similar issues with always being shorter and having small hands and feet and broad hips, but in hormone based changes it's easier to build up bigger bones than reverse the process. Though not much can be done about the fact that their hieght is below average.
hair patterns will be much easier to adjust, and the body of knowledge in endocrinology is getting better. It's got a long way to go before there is less risk of shortened lifespan though.
I think the first steps will have to be improvements in soft tissue shaping and cosmetic changes with better endocrinology advances. It could help many, but there will still be many whole become women who look like linebackers.
I just think that in the end getting the body would be more important than which letters are used to make it. Nobody can see your genes in your daily life, and x or Y won't change anything for you now (well other than maybe making you infertile). So it's really little more than a formality at that point. Besides which there are women born with XY instead of XX. They still grow up identifying as women and live a fairly normal life as women in many cases. There is infertility and some minor health issues. but nobody can tell or would usually care.
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