Well, I've already offered my hypothesis for why he dumped Ironhorse and Norton and kept only the white characters. And I agree it was a thoroughly stupid idea. Ironhorse was a great character, superbly portrayed by Chaves. It hurt to watch his death scene -- not because I was caught up in the drama, but because I was so angry and bitter about it as a storytelling choice, both the decision to do it and the harsh, ugly, unsatisfying way it was executed. The whole thing was just so wrong.