I don't edit my children to look cuter or prettier (unless it's story-driven), but I do edit them for the sake of the storyline in my game. For example, sometimes in the story the kid is supposed to be chubby, but in the game he turns out skinny. It's very hard to get a skinny kid to be chubby in The Sims 4 naturally even if I feed him dozens of cupcakes because all of those features usually only start appearing when they age up into teenagers.
I also tweak facial features to reflect their personality more. Eyes, eyebrows, mouth, all that kind of stuff. Believe me or not but it actually helps! I remember one time when my dad came in while I was editing a kid in the Sims. He immediately pointed out that the kid looks very sad, vulnerable and probably has a hard childhood. That was exactly what I was going for.
