Time for me to come clean.
I told George NOT to use the double-bladed lightsabre in the original trilogy. I thought it would be best not to use such a formidable weapon against a Jedi-in-training like poor Luke. Plus, I insisted, Vader's already mechanically enhanced. Why bother giving him two blades? George agreed and we shelved the idea until he started work on the Ewok movies.
Originally, the Ewok movies were to take place sometime before the events of Episode IV, while there were still a few more Jedi left in hiding. One of them was holed up on the forest moon of Endor, hanging out with the Ewoks. When Cindel's ship crashes, the Ewoks discover it and send for the Jedi (also a humanoid character in the first draft) to help translate Basic. George said something like, "Hey, wouldn't it be great if this Jedi were completely different from Luke or Ben in some way." And I said, "You mean like NOT total losers?" And George said, "No, I'm talking about a look. He needs to be unique, something special, something reminiscent of the original Jedi Order before the Empire came along."
So we kicked ideas around, mostly concerning costumes, bad dialog, and facial tattoos. Then George wanted to revisit the idea of this guy having a double-bladed lightsabre. I said, "What are you, nuckin' futs? This guy's a Jedi, not a Sith Lord. A sabre like this is more likely to be used for attack than defense. It goes against the Jedi code!" He called up this kid he knew in Jersey, "Kevin" somebody, who agreed, but thought the idea of a Jedi on Endor was pretty lame anyway. So we scrapped it.
George and I parted ways after the Ewok movies and rarely get together anymore. Scheduling conflicts... you know, stuff. I wasn't really surprised to see a Sith character wielding a sabre like that in Episode I, and was pretty happy with the way it was portrayed. It goes to show you, as with all of the Star Wars films, the technology isn't the thing, it's the human quality that helps us overcome the odds.
"May the Force be with you."