I'll just go through and answer some of these....
1:I think there is mod called Darkness
2: I think there is a way for the WW to be cultivatable but you can get them by ships now... yay
4: Which buildings?
5/6: Assets are hard to mod, but I know Cairath is working on a way.
7: I don't know about this one, but there is a mod that helps see the different gas types, but I don't know which one it is.
8: don't know, I think the game keeps track...
11:there is a mod like that...