Seems to me the real problem is tieflings. They are hellspawn. Can't change that. If they wanted them to be more humanized, then they should have retconed the way they look. Since they are so retcon happy. Remove the rough demon looks and give them smoother features, smaller horns/tails, less pigmentations. At the moment they are copy paste fiends without wings. Ironic isn't it. The reality is you can't have your cake and eat it too. You want humanized races but then go half assed. Tsk.