Yeah, I don't think people should lash out at anyone because they disagree with other people. It's not constructive at all and fuels nothing but hostility.
You're right! I didn't think about the races you listed, but they could very well make sense for Moon Priests! Since I have a thing for moon and nature motifs, I think I'd be rather fond of them.
Remember the Banshee unit you could become Hordeside during the Darkshore Warfront? That was primarily a healer so I wouldn't exclude Dark Rangers from having a healing spec based on their banshee attributes.