It makes me think of the old indie term “scene not herd”. Sometimes a thing is just a thing. And then, in the rush for significance, it has to become “thing-thing deluxe” to ensure the whirpool of attention, controversy, viewership and opinion settles in a still pool of…money? What do they hope to accomplish with this, that good storytelling wouldn’t? Captain Jack’s kinky-trans-species-plus-everything nature became apparent over time, culminating in the Ianto affair on Torchwood ( great show, when is that coming back?! ) and it was fine, just another aspect of thoroughly interesting character.
But here they have to make an announcement. It must have taken all of their strength to hold back from screaming: “…and she’s potentially bi-racial!!”