I got it to work on a 4.3.4 realm. Only the player models are affected, NPCs didn't change (but it's cool anyway). There is a problem with hair. Some hairstyles don't show up. My female dwarf finally got a pretty face, but at cost of getting bald.

I checked other races ant this is what i noticed: Draenei and Undead models are not yet in this patch (I know, not done yet, I've seen the screenshots). Dwarves and Night Elves have problems with hairstyles - some of them dont show resulting with characters getting bald (looks weird). A human NPC had messed up textures on his hair. And female Dwarves' earrings turned green.

Good job anyway