ANAKIN
I should have known the Dark Side had the true power!
OBI-WAN
Anakin, Chancellor Palpatine is evil!
ANAKIN
The Jedi are evil!
I really love this exchange. For this and other dialogue suggestions, I'd need to go back and look at Ep. III to find out if and how it would work (and of course we'd need someone that sounded like Ewan McGregor. Better yet- send a copy of SOTDS to Ewan McGregor and actually get HIM to do it! Ha ha

Much more dramatic is to have Anakin choke Padme, Obi-Wan come down from the ship, and then have the exchange.
ANAKIN
I should have known the Dark Side had the true power!
OBI-WAN
Anakin, Chancellor Palpatine is evil!
ANAKIN
The JEDI are evil! (read James Earl Jones style)
Enter dramatic, exciting music (not "Battle of the Heroes", which I felt was rather weak personally) as they throw off their cloaks and begin to fight.
Somehow, there's got to be a way to remove the lava surfing section. And Anakin/Darth does not say things like, "My point of view" during a life or death duel on a lava planet.
It always struck me as odd that that whole time, not once did Obi-Wan even try to ask Anakin what was happening, why he was doing what he was doing.
That's exactly right- that's the basic problem. No emotion whatsoever until Anakin is smoldering on the ground. Someone brought this up in General Discussion a long time ago, and I think it's very true- the duel should have felt like Luke and Han Solo turning against each other. That would've HURT.
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I guess the other question that has to be asked is- why did Anakin go to the Dark Side. Was it all for love, to save Padme based on a 15-second dream? This is pretty stupid because Padme dies at the end of the film, and he still sticks around. I know the line about the Dark Side "dominating" one's destiny once they start down the path, but honestly, it's very weak. I think the better explanation is that he's troubled by the loss of his mother, Obi-Wan is restricting him to the extreme (remember in SOTDS he made Anakin take a vow of celibacy, which he breaks), and here's Palpatine with the Dark Side. Palpatine is not only friendly towards him, he teaches him to be powerful. Using the Dark Side is more fun. It's "quicker and easier", as Yoda said in ESB.
The main problem would be showing that this is the case with the footage given.
And then there's the whole pointless section with General Grievous and Obi-Wan. How to make that all work? It's an interesting challenge.
What a wasted opportunity...