no what i'm saying they changed the files format in WoD, so the program i was used to - mpq editor - doesn't work anymore, u need a different program and someone who 'mapped' all features to see them first urself
I used the old program mainly to extract wow music and mob speeches (like LK quotes in ICC or DK intro), but I still could see that - back then - u can see mobs who share same skeleton, like gnomes/goblins etc, heck there are many stuff that are saved in total different names than what they are in game, half of spells for example, i think the druid spell sleep was saved under priest category or something?
Well that editor is dead since WoD pre-patch, also with rise of youtube i no longer need to dig everything myself in mpq editor, even interesting boss quotes u can find them in wowhead, hence why i never bothered with learning how to use the new editor (also i left wow most WoD time)
TLDR: Each race had its unique model that isn't shared with any other playable race, unlike the very obvious reskinned race who share skeletons of already playable races, showing how much 'effort' it takes to make them, since even back then we had for same skeleton multiple mobs, heck Goblins even had their own unique dance when they still shared same skeleton as gnomes, a dance that i believe was never introduced officially to wow and could only be accessed with editor (it was like a wave dance, it isn't the dance the goblins got in Cata when they became playable)
So having a different dance and outside texture for same skeleton is something blizz did since vanilla