Lou, just because Faramir didn't take the ring in the movie, doesn't mean that PJ, did not needlessly alter his character. If he would have taken the ring, not even PJ, could have brought the movie back into any resemblance of the books. Look, I know the movies are PJ's vision, and I have not expected an exact recreation of the books. Its just in that in this case, it seems to me, the change was unnecessary, and added nothing to the movie. I see this differently from the "Arwen" changes meant to flesh out the love story in more detail. To take a passage directly out of the book, " Yet he (Frodo) felt in his heart that Faramir, though he was much like his brother in looks, was a man less self-regarding, both sterner and wiser." And here's the most telling passage from the book, spoken by Faramir himself, " But fear no more! I would not take this thing, if it lay by the highway. Not were Minas Tirith falling in ruin and I alone could save her, so , using the weapon of the Dark Lord for her good and my glory. No, I do not wish for such triumphs, Frodo son of Drogo."
I think this says it all.