Campfire Scenes: After being discovered as a killer, how about making the other beds at the campfire empty? We could have someone standing guard who doesn’t get the long rest benefits, just to make things a bit more tense.
Redemption Talks: If you’re going for redemption, it’d be cool to have a conversation event at a key moment, kind of like the Citadel DLC in Mass Effect. If voice acting isn’t an option, a simple animated cutscene with the companions around the campfire and some background music would be great.
Following the Urges: If you stick with the dark urges, it’d be awesome if the companion with the highest approval could become a cult follower and join in on a murder spree. If persuasion fails, maybe they could even turn hostile.
These tweaks could be awesome with mods if the toolkit lets you tweak animations and cutscenes...
