Ok, I could be wrong, but I think there may be some misunderstanding about what he meant when he said that it's "insane you have one of your two main LO even have that option of being Trans."
I didn't take it as that the "Trans" part was insane, I took it as the "option" part was insane. Having that as an option means double renders on every scene that involves that LI, and for it to be one of the main LI's it means tons of aditional work, unless, as he said you just make her "play hide the sausage" to cut down on extra renders. From a Dev point of view it seems like it would be a nightmare...