Guys... The point of this thread is to say that there is no "lock" in place. There's nothing "locking" these genders away from us. And is nothing to "unlock" them either... simply because they don't exist. There is no "key" to "unlock" these genders and make them playable. They just don't exist. You won't be able to select a female Hrothgar or a male Viera in 5.0 not because there is a "lock", but because these genders are simply not there.
Put another way, it's just a thread about sementics and the use of the word "lock" being inappropriate in the context we're in.
So, OP is technically right, but I don't think anyone actually cares, as it won't change the fact that people won't be able to play as female Hrothgar or male Viera when 5.0 will launch.
You can let this thread sink now... Or continue arguing about sementics to win internet points if that's what you want. One must keep themselves busy until the expac, heh?