What I would have liked:
True form: a 50/50 humany/dragony form to be used in all content with it’s own unique female and male models that include wings and can wear and mog all mail armor. The models wouldn’t have to be pretty just project strength and power.
Dragon form: typical or even smaller fully-customizable actual dragon to do the dragonflight mode thing as well as working the same as mounts do in the rest of Azeroth.
From: What Are Warcraft Dragons To You? - #49 by Silverleigh-drakthul