What we are seeing is a disparity.
Void elves have received more than other ARs, and have received more variety of theme than the race they are based on. Your wording is a bit deceptive as you brush past the whole debate over whether the void elves ‘need’ to have a high elf theme as if it were uncontroversial or equal. That additional theme rises them past equality or equity into their own privileged level that few if any other races have.