the reason female worgen aren't playab;e is because they don't have animations anymore, they got rid of the female draenei animations a while back(right before the pink cube phase) and they've been working on implementing their own animations. this is most likely the main reason they are not playable right now. because the models are mostly finished and could just use a few tweaks. male worgen have had tons of model glitches and were still allowed to be played