I mean the 3 minute cooldown is fair for other racial interrupts in the same vein. Glide is NICE but it’s disabled in PvP matches, so there is not too much of an advantage.
In that aspect they’re about the same par wise as a Zandalari Troll with it’s racials honestly. Or even the Tauren, as you could argue with their knockback they are the superior Rogue, and with their increased HP they’re better for a lot of situations.
I wouldn’t be opposed to a Drakonid race as well, however, I feel like Dracthyr still deserve and will get at least the base classes of Mage, Warrior, Priest, and Rogue.