IMO Beth really should have gone the extra mile and let marriage spread to every NPC, and murder, cause invincible NPCs are [censored] and break the immersion. I don't like sneaking up on an Imperial camp, slaughtering every one of them only for one bastard to hobble around on his knees, get up after a few seconds and continue fighting me. At least knock him unconscious. They should have kept the system from other Beth games where if you kill a quest-important NPC you get a message x or x quest failed, which is way less intrusive. For a company that purports to care about the suspension of disbelief, they need to look at this stuff.