They wouldnt have to be rebuilt just swapped out. The files for the alpha still exist. It would probably be more work to adjust the current model to have the same level of customization proposed, which is already present in the alpha.
hello alewen/khalia, we mEet again.. Happily almost all of the fAcial markings present in the current model were also available in the alpha, and your character would still look very similar.Welcome, but I was just stating how I'd feel. Heck I actually have 2 worgen females. My druid who is best described as a forest child, and my hunter that is best described as a primal. Their looks support the personalties I have given them. So to suddenly have a completely different look as proposed, would effect my characters in an un-repairable way. I'd have to scrap the characters I worked hard on completely and start from the ground up.