As only one of the resident trans gamers her, I won't speak for everyone else. However, for me, fluid elves are rad as hell and should become the default in future publishings. The bigger thing to me, though, was that aside from calling Corellon a father figure (and a couple lines that seem more like slip ups than deliberate), they made great lengths to avoid referring to the god by a given gender in this book. This seems in line with the concept of mutability the book goes for and in some incredibly small way validates the NB friends I have.