AI Overhaul SSE by SpiderAkira and mnikjom is a fantastic mod that breathes new life into the NPCs of Skyrim. While playing with it, I've come across some things that I wanted to tweak. I've made these tweaks so that what the NPCs are doing aligns more with the information that is found in my vanilla+ modded game. There may be mods that change the vanilla information, in which case you shouldn't use these tweaks or you should make your own.

1. The Argonians do not visit the Cornerclub anymore after an Imperial Victory. I like the idea very much, but Brunwulf says he doesn't want to let the Argonians into the city (yet). When the player asks him "Will you let the Argonians into the city?", he replies "I'd like to, but it's not as simple as that. Most of the folk in the city believe as Ulfric did, that outsiders should not be trusted. Until those people learn to accept the Argonians, they must remain outside, for their own safety. Old habits don't die easily, and we Nords can be as stubborn as stone."

2. Sigrid and Embry do not meet up in secret anymore. She rejects him and he pretty much accepts it, so I think having them behave like Olfina and Jon doesn't really fit.
Embry: "Care to have a drink with me, sweet Sigrid?"
Sigrid: "Drunk again, Embry? Don't let Alvor hear you talking to me that way. He'll stick your head in his forge."
Embry: "So that's a no I take it?"

For the first tweak I provide two versions. One that keeps the behaviour for Scouts-Many-Marshes, so that he continues to visit the Cornerclub and one that keeps him outside too.

Credits:
Bethesda Game Studios for Skyrim.
The Unofficial Patch Project Team for the Unofficial Skyrim Special Edition Patch - USSEP
SpiderAkira and mnikjom for AI Overhaul SSE