No dragon in WoW looks like that, so it has no basis in lore. It looks like a Skyrim Argonian with wings. An ACTUAL dragon that transformed into a recognizable humanoid from any of the races would have been better. Basically we should have been like Chromie. Not an Aspect, but a dragon that interacts with the mortal world in humanoid form that can be of any race (outside of a few that make little sense..... most of them are on the Alliance which is weird)
Instead, we got something nobody wanted and only some people are trying to justify. We will see what Blizzard does with them, but I can see them becoming one of the "I made a character of that, but it never reaches max level because I find the class boring.
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Man, for as much work as you did trying to show how to make a good dragon class, the copium is really a bit much. Blizzard will likely make this class/race a bit better, but to say these are "like" the dragons we have in WoW that people wanted to play as....... dude..... disingenuous to a degree that is amazing.