Non issue - not all would have to be done. Like with boots/gloves, if the ability to make right/left shoulder happens they would only apply it to ones which could be split like that and not just everything in the category.
Super exciting! I'm not able to log in to test, but I hope people can really stress this one, trying to find ways to break it - because I want these additions to hit Live ASAP! 😁🙏