You know one reason I don't see them doing this? Because apart from the Midlander/Highlander thing, no other race has any real differences apart from coloring and lore for their separate clans. If it was way back they might have been able to do something though I still don't see them doing claw hands simply because of the amount of work modifying armour for the hands. However now if they did go out of their way to modify one clan it would lead to people demanding more variety for the other races as well which is probably a mountain of workload SE would rather avoid.

The modifications being asked for aren't minor. It would require reworking everything from animations to gear sets to fit the new build less clipping issues and such occur.

I think people are just going to have to accept Au Ra as they are now. Maybe the next race they introduce will fit the desired concept more.