Edit: Just realized that if you can't change the race of the hirelings in the magic mirror then it isn't actually full customization. So, again, better than before, but still not really what we've been asking for.
Can you change the name of the hireling though?
My guess would be no, specifically because of the language in the notes for the hotfix. It says, with my emphasis: "
You can now change
your name through the Magic Mirror." And: "the Magic Mirror will now allow your hirelings to
change their appearance." The way I read that is that the mirror allows the main character to change their name, hirelings to change their general appearance, and nothing else. I won't have a chance to play around with it until tomorrow morning to verify one way or the other.