Unfortunately there's a lot here that would spoil a lot of the story which I cannot comment. I can comment on a few.
1) The game's main story will end in a v4 or v5. After that I won't raise the version number anymore.
3) No. This would require too much effort to have VXA keep up with who wears what if the user could play a warg dress-up game. E.g. if you could put Noel into Lily and Quinn into Rose, there would have to be a custom dialogue section for each host-suit combo for every event where the characters show up. VXA has no dynamic way to handle this (might be possible with plugin). Suit swaps will be reserved inside specific quests.
5) The black wargs are not a reference to anything. They could be red, blue or pink. Black is just a cool color.
9) I think I can manage by myself.