As far as killing Saxon goes originally I didn't kill him. Then I met Sage and I was like "Hold on, let me rewind real quick."
Anyways, at first I didn't kill him because...
1. He was already down.
2. He wanted me to kill him and I didn't want to give him the satisfaction.
3. I don't think he would have actually killed me because that whole situation was a test. Which was proven true if you didn't kill him.
Also, if this were reality I still wouldn't kill him. But I'd make sure his ass wouldn't come after me again. I would just incapacitate him and he wouldn't be a problem anymore. Unless whoever is controlling him can regrow