Sounds like you have a good understanding for your characters and their place in your world! I could easily imagine that shapshifters might be seen as a threat to society (how would you ever know who you were talking to?) where "superheroes" might be perceived as helpful, even necessary (fight crime and all that) for a society.

So as a followup question for you: how do your shapeshifters fit into your world? Are they visibly tagged? How are they identified (at birth? genetically?)

BTW, I really like your setting descriptions!