Huh. You know, despite being a you know trainer/sex game. I have to admit, the story so far is...Interesting. Or rather what i think the story could be.
I think the choice to make it so the game does slave routes first and then love routes is not only deliberate, but also well thought out. Think about it, we can all agree with both the fire and water, the love routes are much more fulfilling and play out better and have better scenes.
Personal preferences aside, maybe you prefer the slave route, power to you. But that is not what is important here. What is important is, is that both tie into the overall story. Granted this is just me guessing or writing a theory for how the games goes, but what i mean is that the the dream spirit, really does seem to be trying to help/warn us.
And while it is in the most violent way possible, I think it is with the best intentions. Being honest there is something VERY off about the painted lady spirit. If you really step back and think about it, with both Katara and Azula, should you choose the love routes, let me ask you a question. Who is it they love?
Your first instinct in you the player, but no its not. Katara loves Aang, and Azula loves Zuko. NOT you. That may seem to be not that important, but really stop to think about it for a second.
What is going to be left for the player character in the very end? Who is going to be there for you? Katara? Azula? Toph or (Maybe) Korra? Why would any of them be there for you? You are not the boys they they love. You are not Aang or Zuko. You are...No one to them.
Think about it for a second. We as the player character, go though all this effort to sluttify and break or romance and love these girls, but then what? They formed no connection or bond with US. They formed a bond with the boys who's body we inhabited. They are the ones they are connected to, NOT us.
And that is what I feel the dream spirit is trying to in their own odd way, warn us about. We must fuck the keep the balance persay, but in the end only insanity might be left for us, because we will have all these memories of these girls and all we did to and for them...But we might be left with nothing, because we are nothing to them. Just another random guy.