About the Arena youtube clip: VERY nice! I like how Padme do not just "Jump!" that high.

But I don't like the first facial shot of Mace once in the arena cause we see some Jedi fighting in the background before the actual fight happens. Anyway it's a major improvement over the original and with a few more work on it I think it could be on the level of a AOTC: revisited version.

Good job!

Now, I don't know if it was already discussed here, but in a ROTS making of book it is said that in an earlier draft of the script Palpatine tells Vader that a Jedi killed Padme. I think it would works better than "you killed her" because it would emphasis the hate of vader for the Jedi and his submission to his master, instead of letting the audience thinking "hey Vader ,wake up! How can you say in ESB that it's such a cool power when it is the one that made you kill your wife?! ".

I think we have enough audio footages of Palpatine to make a line "I think a Jedi killed her..." or something.