There are a lot of interactions and surprises that happen with autonomy turned off. And that is the way I have always played my game. But I am seeing many interactions going on when I am involved with another Sim in the household, and the other Sim is just doing whatever they want. The big difference is these autonomous actions aren't annoying. It isn't like they're grabbing their fifteenth glass of water in an hour then leaving empty or half full glasses everywhere. These interactions are mostly socials and actually have meaning. Sometimes I have to pause the game and read the notifications to find out happened. Parents give their kids a 'family kiss' or praise them for doing well in school all on their own without any direction from me. I have yet to see an annoying autonomous interaction or new quirk pop up. I'm holding my breath because I use about 73 tuning mods that nuke a lot of those annoying quirks/bugs, and I'd rather not add more to the ones I am using. I've put close to fifty hours into playing GT, and this EP plays like a dream when compared to ones like EL and IL. The family dynamic, at least in my game, does affect how well family members get along. It also keeps the family members' relationships from decaying even if two members of the family argue. I currently have a young adult son that will be moving out on his own soon. He recently asked his girlfriend if she thought they should live together. All on his own, while he was visiting her. She's considering it but thinks he needs to focus on his career first. It will be interesting to see what happens to the boyfriend's family dynamic once he introduces her to his family then moves in with her. I'm most excited to see how they all get along once this young couple marries and has the very first infant in my game. This is the couple I chose for that honor, and I can't wait for the next chapter in their life together.
