Improving an old fi7gure, beyond what can be done with additional morphs (and that kind of product is widely available for most generations), will break compatibility in at least soem respects. You cannot have a new figure that simply uses the content for the older figures. Daz does provide AutoFit clones (in the case of Genesis 9 for all previous generations) and those clones can be used as a tool for converting maps and non-HD morphs.