According to the making of Blade Runner book, Hauer made the dialogue changes himself -- the tightening of the speech, along with the tears in the rain simile and "Time to die." He did a bang up job. I love the fact that he doesn't say "you little people" but "you people". By removing the little, we get a different take on things. The replicant isn't looking down on the human as if it were a creature further down the evolutionary ladder, instead, there's more of touch of sadness, as if to say, "You people may be the entities that control the universe, but you're terribly blind, so blind you never actually saw what I was." He isn't superior, so much as there's a touch of the martyr about him -- he came, he saw, he dies and no one ever really knew what they were dealing with. He knows us better than we'll ever know him, and, because of that, he expects little.