Well I think George missed a big opportunity with Jar-Jar. In TPM he comes across as a bumbling fool and everyone hates him. In AotC after being put in the senate, Jar-Jar was going to have a few lines which gave the appearance that he was learning. Then he proposed the bill in the Senate which gave Palpatine emergency powers. Now imagine if in RotS, Jar-Jar is a token in the meetings of Palpatine in regards to the Clone War actions and behind the scenes Senate activites. Now Palpatine most likely still thinks Jar-Jar is the fool everyone in the audience thinks he is, well let's say Jar-Jar either walks into a meeting he shouldn't have (Sid/Grevious) or he connects the dots with some of Palpatines statements and Jar-Jar figures out that Palpatine is the Sith Lord. Jar-Jar immediately heads for the Jedi Temple to inform them, but Palpatine learns of this and sends his new apprentice to silence the annoying Gungan. Imagine the audience reaction to getting the death they wanted but also realizing that the doom of the jedi is near because of it. (you want the jedi to survive but for that to happen Jar-Jar needs to complete his mission...)

You could have replaced the Grevious wheel bike/Boga chase sequence with a short Jar-Jar running to the Temple as the newly crowned DV hunts him down. When catching up to Jar-Jar, DV calms down the excited Gungan, convincing him that what he believes is not true, then with a heavy heart, kills one of his oldest friends. Then we move on to the temple and the murder of the younglings.

What this sequence would also add to the story is that it would give Qui-Gon a little more credibility. He saw something in that Gungan (as did George) and as the PT evolved so would Jar-Jar.

George was so close, i'm surprised he didn't come up with something like that.
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