If anyone cares about my vote, Lando should live.
What's the point of killing him off at the very end of the movie? It's like having Godzilla fall on top of Raymond Burr after dying or something (worse, because Lando is only a supporting character in ROTJ).Plenty of rebels die earlier in the film to show that "it's serious" so it wouldn't serve that purpose.
The "logical" place to kill him off would be in the explosion of the Death Star (and that was were the rumored "death scene" was all along), so the ship doesn't fly out, it just is engulfed in the explosion before it gets all the way out (yee hah!). A pretty anticlimactic death scene anyway. Some people hate his character so much (to this day! for what he had to do in ESB) that they would probably consider the "loss" of the Falcon in the explosion to be sadder. Whatever.
That said, anybody can do whatever they like in a fanedit, so if it's you're dream to kill off Calrissian in your edit, go with that...