Divorce having a bigger impact on families: Why, how and what it should involve?

I absolutely think Sims 2 got divorce right on the nose. It DOES affect the entire family, not just the spouses. Far as I can tell there is little to no reaction at all in Sims 4. Mine just do a goofy smile because they're next to a painting or go to autonomously hug their spouse who just dumped them. Means nothing in Sims 4.

Love your ideas!