I have been into TF/TG since '95 with the TSA and such sites.
I know that a lot of stories in the TG genre do fall into the guy becomes girl insert lots of sex trap. We could list them by the hundreds if not thousands. I think in this story given the circumstances of what the protagonist is going through, that the sex is a double edged sword of sorts, it chips away at who he is as a man and yet reveals another side he probably never imagined. It just feels well woven into this grueling journey that Dean is on to recover himself.
As for
Frustration I can only hope that since you did a Morgan TG that just maybe a Felica TF/TG might be in store as well
Keep up the good work!