My thinking on the matter is... If Blizzard, as the ultimate arbiters of what's possible in the warcraft universe, wanted to tell an apparently trans-related story... couldn't they have just told a story about the actual dragon transitioning from male to female? Rather than them doing what is essentially putting on a disguise to do so?
I think it's pretty clear the whole "chromie" name thing was a mistake someone made a long time ago in the naming conventions and nobody really cared to correct.
It strikes me as more... lazy than anything.