It's not like the story behind the ele weapon doesn't fit. Pandaren have shamans, many other specs are going to "unusual" places as well. Like Arms warriors to under Tirisfal, bm hunters getting a Titan-forged gun, sub rogues getting a dagger from the fangs of a demon.
Well, the shaman artifact was wielded by the titan keeper, Ra-den, who wielded lightning and shit. It makes more sense for a ele shaman who casts lightning bolts and chain lightning at his foes to get such a weapon.
Whereas the WINDwalker gets a weapon "attuned" by Al'akir himself. Also the description that when the Tol'vir let out the powers of the fist weapons, the winds destroyed a entire city was so badass. I'm looking forward to getting my stone fist variation. Also Li li is tolerable at best. I'm a bit concerned whether it'll be a glorified escort or not, but it seems like we'll be riding on the back of a dragon etc. Should be pretty promising.
Also Skywall is gorgeous as shit. I ain't even mad we'll go there again.