Whoa, whoa, settle down Loras! This is a ROTK thread, not a Un-vented TTT issues thread!
But here are my answers to almost all your points.
1. Watch the Extended TTT DVD, and the special feature entitled "From Book to Script, adapting the story" which gives an in-depth explanation for all the major changes. You might still disagree with them, but at least you will understand the reasoning behind the changes you mentioned (i.e. Faramir and more)
2. Some of the Extended footage makes some of the changes make more sense, again concerning Faramir.
3. The Nazgul almost getting the ring in Osgiliath... one of the most debated "mistakes" in the trilogy. The thing is, it's NOT a mistake! The Nazgul are BLIND! That's why in the books/films of FOTR and ROTK, the Nazgul were pretty much just as close, and they still couldn't "see" the ring... but this is still open for debate. I just think people have exaggerated the "mistake".
4. Aragorn's "fall" of the cliff was, as explained in the Extended DVD, a device to set up the "psychic connection" between Aragorn and Arwen. Yes, his fall seems pointless, but it was either that or have Arwen at HELM'S DEEP!!! (And yes, in the Extended DVD, there is some behind-the-scenes- footage of Arwen actually rehearsing at Helm's Deep), so I think that Aragorn's falling off the cliff is better than what could have been.
5. The Eye of Sauron rules!!!
6. Yes, the Scouring of the Shire is gone, not even in the Extended version. However, the farwell at the Grey Havens is IN the movie, even the theatrical edition. It's Jackson's favorite scene in the book and the film.
7. Yeah I know, Haldir wasn't supposed to be at Helm's Deep... but what's the big deal? How does it really tarnish the story in any way? Plus, as Jackson says, there WAS supposed to be some fighting going on at Lothlorien and Rivendell, which they couldn't fit into the film, so why not have some elves join the fight somewhere else?
8. As for the casting issues, Sam is greasy? Shouldn't a fat Hobbit on his way to Mordor look sweaty/greasy? And yes, Elrond is Agent Smith, but that's the case with almost EVERY single Hollywood movie starring any famous actor. For example, can you ever look at Brad Pitt and NOT be aware that you're looking at Brad Pitt, regardless of his role? or Ben Affleck, or any other "star"... actors are overused, that's all.
