Wow, I seem to have set the cat among the pigeons here! 
MsMaisel I have read and absorbed what you have been saying (and I have also revised my initially ignorant idea about who these "transabled" people are following your posts - as you say, the consensus seems to be that they are mainly people with BIID). I wish that I could be as confident as you that there is no threat here but I think about how quickly the whole TWAW/self-ID debate blew up in this country and I'm not so sure. I appreciate your point of view as a disabled person, but I am also trying to advocate for my disabled DS (at least until he is old enough to advocate for himself). I hope you don't see that as failing to centre disabled people in this discussion - I'm speaking on behalf of my son because he's too young to speak for himself (although he's starting to be a great advocate for his needs - and also to notice the ways in which he's excluded from things because of thoughtlessness or poor planning - what you might call the social model of disability).
(Incidentally, my son is also VI (severely sight impaired) and autistic, Deathwish - hello fellow parent! His VI is as a result of cancer so, although I'm not disabled myself, I do feel that I've had an opportunity to observe how society treats different types of disability - childhood cancer, sensory impairment and "invisible" developmental disability. There's definitely a difference, and it seems to have more to do with how other people perceive the disability than with how it actually affects my DS. There's also a difference depending on how "tangible" and "provable" the disability is...)
Anyway, I have downloaded the paper in my OP (apologies for not linking to it directly) and am slowly reading it. If it would be useful, I can recap the author's argument and post some quotes.