I've decided to put at least some effort toward the Serano paper, which criticizes Blanchard's work having to do with autogynephilia. I haven't gotten very far yet, and I haven't gotten into the "meat" of the criticism, so I'll just give an initial impression.
The introduction sets up the critique, and I think this paragraph sets the stage:
https://www.juliaserano.com/av/Serano-CaseAgainstAutogynephilia.pdf said:
However, pitting autogynephilia against an overly simplistic “feminine essence narrative” ignores a more nuanced view that I will refer to here as the gender variance model, which holds that gender identity, gender expression, sexual orientation, and physical sex are largely separable traits that may tend to correlate in the general population but do not all necessarily align in the same direction within any given individual
So, there are three models to deal with, and these are especially relevant to men who express desire to transition later in life, and who are not exclusively attracted to men.
Blanchard's theory, autogynephilia, is that these are primarily heterosexual men who are aroused at the thought of being or becoming women. These people have a very high incidence of cross gender arousal, i.e. they get turned on by things associated with the opposite gender, such as transvestitism or imagining themselves as women.
The simplistic "feminine essence narrative" is the "woman trapped in man's body" narrative. These men behave in a feminine manner. It seems to me that this story has to be adopted by the trans rights activists who insist that transwomen are really women. Their "essence" is women. According to Blanchard, though, most people who fit this pattern, of having always behaved or appeared more feminine, wished to transition early in life and, significantly, were almost always attracted to men.
The final model, which the "gender variance model" preferred by the author says that there aren't any significant connections in any given individual between sex, gender identity, sexual orientation, or sexual expression. As I read the paper, I'll have to be looking for some reason to believe that this is a "model" at all. Does it have any predictive or explanatory power? Also, this model asserts that sex and gender identity are distinct, but if there is no connection between the two, I will be looking for some reason that public showers ought to be segregated by gender identity instead of sex. They are two distinctly different things, in this model. Why is gender identity the one that matters, and why isn't there a "sex identity"?
Perhaps these things will be explained later as I read further.