2. Well, what was Jucas going to do, rebuild the set and refilm it?? He wasn't going to leave it as it was.
3. No matter what reasons you give, it all boils down to this: Lucas should have kept Bolloch's voice.
4. I always hoped that in EP3, we'd see why Vader says "The power to destroy a planet is insignificant next to the power of the Force." We learn that HE destroys Naboo in a fit of pure dark-side rage. In addition, this rage strips the memory of the planet from everyone.
That is power.
5. Cannot comment, except to say I don't like the change at all.
Lightsabers:
Horrible mistakes. Especially that last one. Luke's green saber should be in front, since its being blocked by Vader's blade, yet we see the red core of Vader's saber. We should see Luke's core.