Although I love the movie, I do still wish they had not expanded Arwens part. I hear they are expanding the parts of Arwen and Eowyn more in TT. They were just fine the way they were in the book!
I know I know, it's to get the peeps in to see the movie who have never read the book.
And what's up with the poster that shows Aragorn with Arwen and Eowyn behind him? What does that have to do with the actual story, anyway? If you didn't know the books you would think Aragorn is the main hero and those are his 2 babes. Sheesh!!!
That's not all that far off.
Aragorn is one of the four main heroes of LOTR, the other three being, IMHO, Gandalf, Frodo and Sam.
The book made it obvious that Eowyn had a serious crush on Aragorn, although in a somewhat immature way.
Like you, I'm not crazy about the tampering with the canonical story to get the broads into the action more, since I think the heroics of Eowyn stand out better in isolation. But I think most of us recognize that PJ has accomplished something I would have have not believed possible.
BTW, I wonder what will happen when ROTK premieres and people realize that all the Bad Men have dark skins? If he stays true to The Book.