mathanxiety I agree with you.
I think that, even with the complications associated with surgery 'down below', if a transwoman really 'feels like' a woman and wants to be a woman, then I would expect them to not be keen on their penis and not to have a fully functioning penis. Hormones can do that very well.
If that person actually still wants a fully functioning penis and wants to have sex with it (with another woman or a another man), then they cannot really be wanting to be a woman.
In the same way that, I'm pretty sure a FTM would be very upset by still having periods.
So in effect, a transwoman who will NOT fully transition to a woman isn't a woman.
I'm not sure what to call that person. But she/he isn't a woman nor does she/he want to be one.
As Noodle pointed out, it seems that this situation is born from a very misogynistic pov of what makes a man/woman, one based on very old fashioned ideas that men and women are somewhat different in their brain etc...