a villain with no development is no villain at all IMHO. And what with biotics I dont see swords as obsolete though definitely less efficient what with omni-blades! Also I would never consider Kai Leng my equal, more like he wants to be better than me but fails. Kind of like how the redskins think they are cowboy's rival. Most cowboy fans dont see it that way and view the eagles as more their rivals.
sorry but kai leng > than darth maul for me. Maul was less menacing/interesting. Sure he was a badass and I am not disputing that, just not as interesting for me. If they made Maul like Kai leng and stretched him across the first 3 movies it could have been better. Maybe make that a reason why Anakin wants to be more powerful, to kill maul thus fall to the darkside. But w/e I would have rewritten the entire prequel trilogy. But that's a different topic entirely.