Word. I think they've done a very good job at handling the differences between 'Korra is this way because she is female and brown!' and 'Korra is this way because she is Korra!' That's not something I say lightly. They definitely seem more self-aware than most writers/creators about the cultural context they live in and what sorts of lazy characterizations can happen in that context. I'm sure I would have more thoughts, but mostly I am tired, and I think you guys have it covered.