Cool I guess.
Though I kinda liked the WotLK Proto-Wyrm a little better. Seemed more believable flavorful for the class's starting experience you had to play to get it.
Astral/Spectral seems like a pretty big leap for a fresh panda experience.
Not to mention less unique looking as a recolour, at least the Frostbrood had some new details and face shape to it despite the Proto-drake skeleton