I would really love it if the beards and the moustaches were split into two separate options, because some of the moustaches in the current beard-moustache combinations would IMO look really cool if used on their own or in combination with other beards. And with some of the current beard-moustache combinations you can clearly see where the beard ends and the moustache begins, so in these cases it would be relatively easy to figure out how to split them.
I recognize that this overhaul would take quite a bit of time and effort to get done, but IMO the customization system would be much better for it afterwards, and it would open it up for a lot more combinations.
