1. The mechs looked like they were heavily aided by 3D modeling, so that’s why they look different when they’re moving and their lines aren’t as solid during rotations.
2. I don’t think the Airbending kids will be part of the “Krew.” I think Pema will have her baby at the most convenient plot moment, which would likely be after someone dies. (Death, new life, you know circle of life, SIIIIIIMMMMBBBBAAAAAA)
5. I’d guess in the episode titled “Skeletons In The Closet”
6. While Devindra thinks Bolin is doomed, I think it makes more sense to kill Asami.