Aww, thank you, lovely! :3 I also feel their brotherhood and prior connections are often played up, their ranks are so disparate that I highly doubt they would have known each other prior to Gabriel's disappearing trick. This is actually why I enjoy the idea of them bonding on Earth even more: they come together because of what they presently have in common (the rebellion, learning humanity), not what they might have shared before.

Well, did you read Gamble's press conference? There was nothing spoiler-y in there, per se, but she did say she would be open to Gabriel returning if they could find a reasonable way for it to work. So, there's always hope. :]