It's hard to add a lot of facial diversity when your game doesn't make use of sliders for angles, sizes, width, depth etc. Sure you can have a lot of static models that you can switch between but that will always be limited by itself without sliders. Hair is another issue and I suspect part of the reason they haven't done more curly styles or braids is because they can't get it to look right or up to their standards. Or they may just not be exploring it, no idea.

Either way I think labeling it and making into a purely racial issue is heavy handed, and labeling facial features as "Black lips" or "white lips" etc is pretty unhelpful to any case you're trying to make when you're talking about race. It's not very hard to say fuller lips, wider noses, flatter noses and so on.

As for the skin tones themselves I've never had much an an issue with them, more would always be better but I've never felt too held back by what we have, but that's just me personally.
At the end of the day though I'm sure everyone would love more options, whether it's to make the character look more like themselves, or more options to make your own character, and there's nothing wrong with that.