I think that the transwoman should be allowed to compete IF she's undergone orchiectomy, or if there are specific limits on her T range. She should be allowed to compete, but she shouldn't have free ride to what basically amounts to steroids.
EDIT: I mean to say that she could abuse the system by selectively stopping her AAs, or even by using anabolic steroids and blaming it on her condition. Not to imply that she's doing that, I just mean to say that there should be safeguards to ensure that a transwoman DIDN'T do that.