Maybe Muffinus wasn't aware, but in the interview with wowhead he said:
However, Vulpera are using a number of more fluid-looking and updated Goblin animations. It is very unlikely they would develop unique yet incredibly similar animations for just one race that uses another race's rigging, so it's safe to say that these new animations will also be found on Goblins.Q: How are the Worgen and Goblin updates coming along?
A: Right now Blizzard is focused on Allied Races. Nothing on the immediate list but they want to!
What's the deal? Why would they update Goblin animations but not say they are updating them?