It's up to you what you mean when you say "reskin". It's all about what you want to convey by WOW Classic TBC Gold "reskin".
The only "original at the time" mythic mount I can think of is Archimonde's Felsteel Annihilator. The Sylvanas mythic mount is also a new type.
A recolour is often a swap of texture. I'm not entirely sure what the definition of the word means. It's much simpler than any other job to change the color of a picture, since they only have to change the colors by using a slider, and then call it done.
that's why it's and a bit gruesome to see such armours that are just recolours since you could just put an intern on buy WOW TBC Classic Gold that and they'd generally be fine. Recolors ought to at all times be a slider to which players have access to..
The Wall