They look visually nice but the run animation looks like a rocking horse, far too stiff.
For a second I thought you said “vorkai” and now I need one of them as a mount. 
I think they are based on the Unicorn/Swift Windsteed rig.
Just be thankful they weren’t based on that god awful Runestag/WoD talbuk rig that has hilarious anatomy, huge bull neck goes straight into this tiny chest with zero room for ribs or a collarbone.