I have a definite problem with teens and YAs just moving out without my say-so. In my previous iteration of my Cantrell family. I kept the teens in the household, so that I could help them pursue their aspirations. They even went to university while living at home. Worked out fine and the rest of the household didn't get harmed by lack of my attention. As for allowing autonomous marriages and divorces, I think there is already a way for that to happen, unless I'm thinking about a setting in the MCCC mod.
As for joining other households, that can be done via Household Management in the map view.
Yes but I don't want to arrange my all unplayed households to split their households or marry them all the time. MCCC does this automatically we need neighborhood stories update for this.
Hm. There must be a way to shut that aspect of MCCC off.
