This would be for enhancement only, as it would be OP for a healer and elemental. Both elemental and resto are ranged based, so approaching your enemy isn't really a problem. Enhancement has the original problem of closing the initial gap. Other melee dps have some form of quick acceleration or stealth to start combat.
Warriors have charge, cats and rogues stealth, dk's have death grip. However shaman have to manually run all the way up to who they want to attack. This means that shaman usually don't get the opener and this hurts especially with our squishiness and lack of defensive cd's.
Ghost wolf without name plates would give enhancement shamans some element of surprise and allow us to attack without the enemy being fully prepared.
As is, ghost wolf is pretty stealthy. The name plates completely gives it away tho so there is really no element of surprise as a wolf.