Maul vs Obi-Wan & Qui-Gon is great because in comparison to the other prequel fights, its choreography isn't nearly as crazy as the stuff in Episodes 2 and 3. The Maul fight actually feels the most like an original trilogy fight, and it really shows.
I think if it didn't hate light-sabers being used so often by that point in the film, the battle would have had more impact. I agree, it's easily the best in the new trilogy. Everything in the following two films was pretty awful.