While I totally agree about that, sadly there are other horde fans that believe red ‘dark ranger’ eyes cannot and should never be added as an option for the Blood Elves, as they only belong to undead elves. Others tried to make the point that Death Knights retain the original race’s name and skills but it was answered that that’s an exception to be reserved to hero classes only.
So, to them it would be either a new hero class (won’t happen) or an undead allied race (very unlikely as Blizz seems more keen to allow customization rather than adding more races at this point) or none. 