Me, reading this thread.
This part I will respond to though... Book 4, when compared with the slave route of books 2 and 3, is crap.
There's entirely too much focus on random side girls that mean nothing, and sooooo fucking little actual Korra content.
I wanted her as broken and manipulated as Azula was, or as taken advantage of as Toph was. Instead, she's still the same attitude riddled brat, but now you can cum on her feet when you want... That's crap.
Asami also should have been handled sooo differently than she was.
Let me throat fuck Korra as punishment for her attitude. Let me choose to be downright vile to her all so she can learn Airbending, and leave Amon out of it.
She should have lost her virginity to the MC, not to the MC dressed as Amon. Its just all shit.