That's what I'm saying, any mounts outside of the race mounts, aren't content. Filler is not content, fluff isn't content.
Filler;
Old Raids
Old Dungeons
Mounts
Pets/Pet Battles
Achievements
Old Zones
Fluff;
Toys
Transmog
Mind you. I'm not saying the filler and fluff, isn't neat, engaging or desired. All I'm saying it's not pertinent to the content, the purpose of the game.
Anime gets a lot of shit for the same logic and reasoning that I am giving.
http://tvtropes.org/pmwiki/pmwiki.php/Main/Filler
Filler is pointless, but that doesn't mean it's not entertaining.