I'd like to be able to mix and match beards with head skins. For instance, I use the Triumphant head skin but I'm not a huge fan of the Triumphant beard's separated mustache and goatee and would prefer to use the default or Guest of Honor beard, and I think the Victorian beard would suit the Mad Scientist head skin nicely, and the Guest of Honor and Survivor beards could work well with any skin to add a touch of class or a touch of scruff. I know this is already technically possible to some extent, because when I reloaded a server from before the update where I was playing Wilson and had a stage 1 beard, I still had the Triumphant head skin with the default skin's beard. (I guess I can never shave or change clothes again if I want to keep it like that.)
It also looks a little odd - perhaps even misleading - in the item collection right now since all the beards are previewed on Wilson's default skin, and I don't think that can even happen in-game right now.