[Lady Pi Phi]

Originally Posted by MysticCat

But I think, from a story-telling standpoint in a movie, they probably are necessary....

Neville (or someone other than Dobby) had to find the Room of Requirement because otherwise, we would have had to go into the whole thing about how Dobby now lives at Hogwarts, something none of the movies has addressed so far. It's cleaner from a movie story-telling to let one of our established characters find the room, and here it coulf be used to develop Neville a little.

I think it would have been better for Harry to have found the room, becasue after all, it was Dobby who showed Harry the room. I don't think it was really necessary to have Neville find the room.

Likewise with Cho. As I said before, using Cho to tell on the DA prevents the need to introduce an additional character and provides a reason for Harry and Cho not to end up together without going into the additional Valentine's Day scenes and the like.

I disagree. It could easily have been "Marietta" who ratted them out. In the scene with with Umbridge giving the students the Veritaserum, one of them could have been Marietta. They wouldn't have to give her lines or really identify who she was. The readers of the books would have figured it out, and those who didn't read the books, would have figured it was just another student.