So basiclly, Ady wants to kill the only black guy in Star Wars? Think of the aplications of that.
In truth, I'm not the world biggest Lando fan. That bieng said, killing him would be just plain silly. Tweaking effects in one thing but I think a line is crossed if he goes down this road. Plus I don't think it's relevent to the story at that point if any of the side charactors die. The fate of everything, story included, falls on Luke. Does Luke die? Does he kill Vader? Does the Emperor Luke? It's all in Lukes hands. If you were doing to kill someone it would have to be in Empire, Jedi is too late in the game. And anyway, I don't think killing Lando is "bittersweet" enough. Lando flies the Falcon out of the burning Death Star, Nuff said.
What are you going to do next, kill Wedge?