Well, the fighting between Rose and Harry had to happen. It showed the dynamics in their relationship, because no relationship is perfect. The fighting was also meant to show the differences between Rose and Harry. Rose was a lot more immature and rash than Harry was all the time, and in turn Harry was more unforgiving. As for Draco slitting his sisters throat, no he didn't. He just threatened her. This was done because magical threats didn't ever scare Rose, such as if he'd used an unforgivable curse, she wouldn't be scared. But the fact that he used the switch blade shows that he knew what would terrify her, and that's why he used it to threaten her. And the sad ending. Well, there wasn't another way to do it. I didn't want to change the original ending JK Rowling had presented to us as fans, because it was very well thought out and beautifully done. Harry and Rose couldn't end up together, because Harry and Ginny end up together. I'm not sure what exactly you mean by the book request, but I'm sure if you really wanted to you could message me about it and I'd see what I could do. I'm sorry this is so terribly long, I just think everyone deserves an explanation if they need one. I'm sorry you didn't like the book ending. Hope this helped cleared some stuff up (: