The only reason why they had that much animation and a slow stopping animation was to simulate the time it takes for the server to recognize when a character came to a complete stop.

If you tried to cast a spell from the moment you let go of your forward key/controller, the spell would cancel because of movement back in 1.0. So you had to wait for the animation to come to a complete stop in order to start your casts. They did away with the animation since the response time was increased in ARR.

That animation does not exist in ARR and won't be added due to the already strained servers at near capacity.

They cannot add new faces to the game for example. So there is no chance of them adding this animation for each race.