There's never enough Astrid.

I honestly just wish that, since we had these "new" characters, we could have seen a bit more about how they came to fit together the way they did.

Yeah, it feels like we needed another two or three seasons to get to know them ourselves first, but there just wasn't time to go that route. Too bad fandom isn't bigger so there would be more chance of finding fic that fills in the blanks. :)