Maybe it's because I took about a year and a half off between the start of Chapter 3 and the end of the game, so maybe my anger toward Letho and my kinship feelings toward Foltest waned, but I felt the same way in the end. A bit like, "I don't agree with what you did, but I understand why, and if I had come from the same place as you, I may have made the same decisions." Ditto regarding professional courtesy. As much as Geralt plays in the world/politics of humans, I, as the player, have never really felt like I/he belonged there, and always operated a bit outside. So it's a bit easier for me to distance myself from the "lawful" choices and take on a more chaotic good/chaotic neutral stance.