Eustace becomes better at the end by Rebekah Walton

There has been basically a confirmation that Eustace indeed does become better in the end of the movie. Or at least that's what it sounds like.
Morgan Keavney-Rattue, Stand-In for Eustace said something the affect of:''....Until the end of the movie, where he(Eustace) is nice.''
I really don't like them changing the order of things. Eustace becomes nice near the middle of the story in the book. This could ruin the whole friendship that Edmund and Eustace end up on having in the book. If Eustace becomes nice where he is suppose to be in the book, Eustace and Edmund can become great friends while on this trip, and so can everyone else. But if Eustace becomes nice near the end Edmund's friendship with him will just start up at the end of the story and they will not become great friends by the end of the Voyage but only just start their friendship and come back from Narnia. I think this is important. Plus, my two favorite characters in Narnia happen to be Edmund and Eustace and so I of course want to see the friendship of Ed and Eustace. Also, I think if it(Eustace's transformation) went this long in the book, some one would have gotten tired of Eustace and tied him up by the time the end of the voyage came around or something. Also, in the Silver Chair, Caspian's friendship with Eustace wouldn't have been as great as it was and if Eustace's transformation was at the end. Anyway, I think this cuts down on the friendship theme in the book if this really does happen in the movie.