One of the oversights using the retail transmog system in Cataclysm Classic is that there doesn’t appear to be a collection for thrown weapons, as they were removed from the game at some point. As such, thrown weapons are not transmoggable at all in the current release. This isn’t a huge deal, but very annoying for Rogues, as we are forced to use throwing weapons in order to use Fan of Knives, which now requires one to cast it.
I understand it likely will take some time to address this, as the collection would need to be expanded to include these skins, but seeing how we will be using thrown weapons from here forward, I think all Rogues would appreciate it.