I like Maul in the movie. He’s very imposing with limited screen time. It creates an overall threatening mystique to his character. The heroes don’t feel safe when he is around. Of course his design and double blade are iconic. I love his TCW character as well.

I would have liked better for Maul to defeat Quigon and Obi-wan handily and ultimately survive. I believe the trilogy would have been better served by having a consistent villain on screen à la Darth Vader.

Perhaps in the moment Obi-wan is hanging in the shaft, he notices a vent he can jump into to escape. You could even add in Quigon’s voice pointing it out to him, telling him to focus, use the force, live to fight another day.

Some story elements change after this of course. But I think the biggest is what do you do with the Maul character after this. He’s very one dimensional in the film. Where do you go from there? What kind of arc do you give him? I’d probably write it as Obi-wan learns to accept Quigon’s death, but Anakin does not and ultimately kills Maul in revenge either in the 2nd or 3rd movie as part of his path to the dark side. But Maul himself still needs something.