This isn't so much of a suggestion - rather a request. I begged for this to be done on Live to no success.
Anyway, Slayers have a specific shape of beard - model 13 to be exact

^ this one. To me, it is the coolest. But it is only available to slayers, although it would look awesome on other dwarf classes too. There used to be an IB statue in Altdorf's 'hall of fame' that had that beard and a helmet like the BQ model. Looked just cool as hell.
So my request is obvious - please consider making that shape available for other classes.
That seems doable to my amateur eye, and I can't imagine how it could harm the game.