Yeh, though I'd say that's more model limitations, cause again, it is pretty likely a lot of forsaken are elves in lore. I think Dark Rangers stand out because they had to be noticeably elven, and they might be less rotten because of the specific magics that make them.
While I support more paladins overall, the fact that paladins are just tied to a strong cultural worship of the light is what makes the unplayable in most cases. And Forsaken are definitely not light worshipers.It also bugs me that Forsaken can't be paladins. I know there have been various lore justifications for it over the years, but look at it this way:
Four of the seven human kingdoms are explicitly playable (Stormwind-Human Gilneas-Worgen Kul Tiras-Kul Tiran Lordaeron-Forsaken). Only one of them can play paladin, but two can play druid. I think that dilutes the lore and characterization of the races (and classes) more than a quick excuse for Forsaken paladins does.
So either they have to make the paladin archetype about more than light (Void Paladins would allow for Undead and Void Elf paladins) or, give the Forsaken a strong light worship aspect... which with Calia, is actually feasible? Not just as one offs, but as a cultural movement -specially since they lost their god-queen and their faith is kinda shattered-