For the Shaman, When TBC classic arrived, the animation for Rockbiter weapon, Flamgetongue Weapon, Frostband weapon, Windfury weapon and Earthliving weapon was missing and its still not here.
Its basically the same animation as Bloodlust apart from the lightning / coloured effect that varies depending on weapons skill. That one is there though, 
so its only the bloodlust animation missing.
Same with rage. Missing animation too. (Seen that on all races / classes )