All fair enough. I don't disagree with some of your criticisms at all—I like the invisible dimorphism, but I do find the lack of customization awkward. On the other hand, this may open up opportunities like Nerubians down the line, too, which is something I'm all for. The removal of the limitations of armor is kind of nice and could give us things like Naga, Nerubians, etc., which I'm sure everybody would like.
It is very awkward they made them look like discount Blood Elves, for sure. I'd probably have made them something else, perhaps more elaborate and interesting. I'd have preferred if they just gave us actual Dragons.