There is a gorgeous spirit-like drake that flies around Shadowmoon Valley, part of the questing there. If Blizzard wanted to provide a quite unique dragon skin mount for something like Timewalking week, might I suggest that lovely drake.
Wish I could post a direct image, but it looks like this:
https://imgur.com/WQU5Vtr
Here you go!
Beat me to it. 
Tbh I’m sad they never used the old drake models. They are so good.
Oh neato!
I like that dragon!
Awesome suggestion Kneeshooter!
It’s very pretty, and i hope you guys get it some day, but all of my favorite mounts are small and quiet, i hate loud (both visually and audibly) mounts with big animations. I even dislike these new broom mounts because they sway so much lol
It’s one of the original Aspect/mature dragon style models. He’s the leader of the Netherwing.
They’ve never used that one for mounts, just the younger drakes. Not sure why.
You’d hate me then 
I’m the person stutter step mashing spacebar to make ravenlord endlessly caw.
Someones gotta do it 
Aren’t there similar translucent ones in Netherstorm, though bluish-purple instead?
Well, i won’t hate you, but i won’t be near you for any length of time, i have little places in different cities where it’s very quiet and you rarely see other people lol
Challenge accepted!
Yep. Just none used for mounts for some reason. I guess they didn’t want to shrink them that small? Or maybe they were just like, “A mature elderly dragon isn’t going to want to play chauffeur to a mortal.” They still seem to have this attitude in Waking Shores too.
Mortal bosses get to ride fully grown drakes.
That’s why we kill them! Pure jealousy. 
My fav are the MoP discs for those reasons.
But I just got the Soaring Spelltome, and I’m now using that - it fits the bill, and it’s an accomplishment. Perfect!