So since Wildhammer have tattoos and Bronzebeard don't, giving Bronzebeard access to tattoos doesn't make sense anymore in the post-allied race era.
A Wildhammer Allied Race would give them exclusive access to the following:
- A slightly bigger model (Since WH are bigger than their Dwarven brethern)
- Tattoos obviously
- Exclusive hairstyles/beards that don't make sense on BB (mohawks, feathers, etc.)
- WH Gryphon racial mount
- Neat WH racials (stoneform doesn't make sense for WH but does for BB; DI got neat racials)
- Shaman totems that don't look like the crest of Ironforge (wtf was that about anyway?)
- Wildhammer voice-overs (insert red-shirt joke here)
Suggesting a barbershop solution is just comical at this point.