First paragraph - fair enough. I stand by not seeing the racial lock adding much in this case, because there's nothing about them that really screams a certain style beyond "casual" or "cutesy" or... borderline lingerie I guess lol (at least for the female versions anyway).
To the rest of your points, I don't really see it as a big deal or a priority either. It's just something that would be nice and that I'd personally like to see. I don't see why they can't add new items and also refit these though, even if it takes longer.
It also isn't about fairness for me, it's just about having a preference for the looks. I actually really like the fem Miqo and fem Midlander versions, but I very rarely play Midlander and have fantasiad back and forth between Miqo, au ra, and Viera (when available) for years. I'm not a fan of the au ra version because it's a little more frilly and works with fewer glamours, but I can do a lot with the other two. I especially use the hempen shirt a lot when I'm fem Miqo. I'd like to be able to use it when I swap, and especially think it'd look good on Viera. Who are already sharing a look anyway.