I agree with the OP.

Absolutely need:
-Longer and more elaborate beards and hairstyles.
-Options for scars, jewellery, etc. (but this applies to all races)
-More Dwarven faces.
-Dwarven appropriate voices.

And of course a Dwarf companion or two. My concern is that with Larian's penchant for outlandish backstories, we'll end up with some daft overcooked character...like a winged dwarf or something.