I just have two suggestions, altough al the other stuff mentioned sounds great.
If you have a couple trying to have a baby it would be geat if the sentence in the action bar shows "trying to HAVE a baby" instead of "trying to MAKE a baby". Real people don't make baby's so virtuals can't do it either.
Another thing I have noticed is that the moms carrying a baby do different kind of things but ignore the other kids. I have been trying over and over to let them tell a story or tickling, they just don't do it.