Aging is probably going to be the next big addition. You could try to decrepify the skin textures I guess but for best results I’d need to use a normal map and probably a morph target as well.
Beards are more difficult than hair because the top of the head stays the same regardless of morphs but for beards they would need to be fitted to like 15-20 morphs. It’s on the future shelf but if you’re a content creator you can email me.
You can get pretty large variation but if you want even more you could change the shape morphs to be sliders instead of options, with some modifications to the menu, which would allow you to mix different shapes. The reason it’s not like this by default is because it’s very easy to get irregular/unnatural shapes with that setup.