I don't call it harem route at all. Both the walkthrough and the game code contain the name "open marriage". That's how I think of it. That's how I write the story.
There are two women in the game who think that way about Rick, but that's it. Cora's not one of them, she won't be. She (and Rick) is constantly tempted, and part of the story of how the player responds to these temptations.
If you don't like it, then I honestly recommend that you look for another game, because in this case, it's really not your game.
No! The rework came out good, because Cora has become a significant character for
the whole story. The sentence about chapter six was just a side note. That's why I put it in brackets.
Whether you're on NTR, Spouse, Divorce or Open Marriage route, that doesn't matter, Rick could become a crime lord, and Cora stays in the game as a secondary protagonist the whole time. Obviously, each route will have a different ending. Rick can finish the story with Cora, or Sam, or Miri and Ash, or Cora-Sam-Ash-Miri-Jess-Rachel-Kelly-Judit or he can be alone. And Cora can finish the story with Rick or Daniel or Miri or Beth and Jake, or she'll be alone too. (These are just examples, not the real endings!) Or they can both die. (This is really going to be one of the endings.)
There's only one way to find out: you play with it. If you like it, it's good, if you don't, you delete it. I won't be offended, I promise.
Or you won't try it at all. That's okay, too.