However not every model was given an update. For example the Druid class, which has different forms that they can shapeshift into, has not been given an update. However the good news is that Blizzard will be doing something about it (finally). This was confirmed by Blizzard’s Community Manager Lore on the forums.
According to Lore, it has been confirmed that in the Legion expansion, Blizzard will be introducing a higher-res model to the Druid’s Moonkin Form. Blizzard has wrapped this up in an “update” so we’re guessing this means changes to the textures, and possibly the animations (hopefully).
Unfortunately it was not mentioned if Blizzard will be giving the other models that the Druid can shapeshift into an update, but hopefully those will be planned as well. As it stands there is no fixed date on when Legion will be released but if you enjoy the Druid class, this is an update worth looking forward to.