DK's obliterate animation and sound is completely broken on Worgens

So I used a character boost my first DK and I picked worgen and turns out there is a bug with the obliterate animation, no impact animation/sound, and the animation and sound is out of sync. Apparently after looking it up the problem is known and has not been fixed for years, it also affects other races. Is it possible to get a race change for this or something? The class/race combo is very annoying to play…