Clearly there is a problem with understranding what lightforged are. Yes thge process of getting to be member of that order can change your appearance, most notably those augments, Tattoos and other thingies that are the cosmetic difference, but it does not mean that your hair or how they comb their hair should be based on what order they are in. These are especially easy to change if one chooses so with a hairbrush, a comb or a hair dye. Skin color is different though, but im not sure are the lightforged really filled with holy light, changing their appearance but still, this could just be a part of being in the order a long. The more agend and experienced draenei could have the light imbue them and change their appearance more while young member could basically look just like normal draenei with only those added augments and runes that clearly are part of being in the order. These are things what can be shared and what cant be shared. In addition to what we now have as same options, the hairstyles, hair colors and MAYBE skin tones should be same with both.
They are not really a different races from different gene pools or something, they are just(Lighforged) normal draeni who have been initiated as part of the order. In this process they get their augments, rune and tattoo. Also they get their special skills(Passives and ability). In addition to be completely realistic, the lightforged should also ghave skills and passives the basic draeni have, but in gameplay and balance point of wiev they should be different…