I'm not going to waste too much time on this useless bitching from people who don't grasp the concept of a business, but that aside, just because a mount is unique does not mean it must be a store mount. Every time something new comes out you all run around bitching, "store mount" "WTF BLIZZ" blah blah. There are 10 mounts in the store...10. The celestial steed is a reskin of Invincible, and the Iron Skyreaver has a counterpart as well. That leaves 8 unqiue (loosely stated) mounts; shit, let's for fun add in the deluxe versions of the expacs, that gives us 11 (maybe 12, idk if cata had one). How many fucking unique mounts (using same level of loose distinction) are there outside of the store? Let's start with every single Gladiator mount ever (18 and counting), how about all of the end game boss mounts(you know, like Mim's head)? As others have said there's the moose, there's the strider (now 2), what about the grand yak, or the first mammoth, what about the core hound, sure it'll get a recolor now but it's still unique, what about the vicious mounts? Galakras mount? The sky golem? (sure the fel reaver mount is the same skeleton, but each very unique), profession mounts? specifically the carpet and all the unique engineering mounts (don't forget the love rocket), what about the black quiraji mount? how about the seahorse? Ji'kun mount?
It's almost as if you have no history to validate your baseless cynical opinion that the store is the only way to get the "special super awesome mounts". I personally own most of the store mounts, I buy them on sale, I get them to collect mounts, that's it. (btw you can get the 300 mount achieve without these mounts) I don't even use them because they aren't all that amazing imo and maybe they have special effects but they are far from unique. You want unique? Go be a Gladiator, go be Fragnance and get the world's first Felsteel Annihilator, hell, just raid in general, go farm gold and buy mounts you can't get anymore from the BMAH. Damn, seems I did take time on this post anyways.
Also, before you start bitching about reskins in general, and how blizz is "lazy now and just wants money". There's been reskins since vanilla. Welcome to game (digital) design dipshits, you reuse basic structures and elements to allow you to actually FINISH what you're working on and to allow a base level of variety without blowing 10x your budget.