Obviously you guys don't understand the reason MMO-Forums exist...
See, people are only allowed to come here to complain about anything and everything WoW oriented. If you agree with them, you are welcome, however if you disagree with them or even make your own post on things that you enjoy about WoW, you are a fanboi.
With that said... as a professional designer myself, I can't do anything but laugh at the OP's post about re-using model skeletons. Its nearly the same argument as comparing video games and how "one company rips off another company". When you make a product, making a base-mold is customary in every.form.of.production. Even car companies make several cars out of one platform, and the cars can often end up 100% different. Why would blizzard spend the time making brand new skeletons, animations, etc to make a new mount? The man hours involved in making and then perfecting the model-skeleton and animations across the board are staggering and completely unrealistic to expect a new one for every mount.
Oh and... once again my signature works beautifully here.