The change of Faramir annoys me intensely as he was a favourite from the books due to his noble actions and his similarity (in my mind) to Aragorn.
I can see why they changed him, for a more intense storyline it did work well, but I still don't like it. Imladris' idea of a flash-forward scene would have worked wonderfully. It would have shown again the power of the Ring and given the audience a respect for Faramir that he could see the evil inherent in the Ring and so let Frodo and Sam go. There would be no need to cut out any of the preceeding scenes such as the attack or the capture of Gollum, this could still be how Faramir discovers that they have it.
Any budding film-makers around who want to give that a try

.