So much qqing over mounts.. If you have a look at the arena nether drakes from Arena Seasons 1 to 4 (Burning Crusade xpac) they are just normal nether drakes with armour put on them. And as far as I know no one complained back then about having reskinned nether drakes as the rewards for being good in arena.
http://www.wowwiki.com/Swift_Nether_Drake (Arena Season 1)
http://www.wowwiki.com/Merciless_Nether_Drake (Arena Season 2)
http://www.wowwiki.com/Vengeful_Nether_Drake (Arena Season 3)
http://www.wowwiki.com/Brutal_Nether_Drake (Arena Season 4)
But oh no they reskinned nether drakes and added stuff to them. Oh the humanity how could blizz do this to us back then. Get a grip the new mounts are fine and yes they using a LK drake model with added armour to them but it has been done before and will be done again.