If people have transitioned and are mentally stable, it's probably overbroad.
I don't really have an opinion on trans people on the military, because I simply don't know what the effects of having trans people in the military are. I have veteran friends who think it's fine and veteran friends who think it's a terrible idea. Most of my officer friends are in the "it's fine" camp; most of my enlisted friends are in the "it's terrible" camp.
I'm pretty pragmatic when it comes to the military. If there's evidence that trans people can do the job, let them. If there's evidence they can't, don't let them. But one of the reasons Trump gave on Twitter--the cost--was idiotic. The military spends more on Viagra than on trans medical costs.
As to disruption, I honestly don't know. I'm reserving judgment until I know more.
~Camilla
Ghavrel is Ghavrel is Ghavrel
*MySmiley*