How about birth control for VV3 so that parenting skills can be increased without a population increase or message saying that the village cannot support more population? Or option to disable the message anyway. Plus both parents should gain parenting skills (not just the male if male initiated the exchange) if the female has a baby. There should also be things that the females should be able to do while they are caring for their baby to gain parenting skills or impart skills to their baby. (If they decide to put spiritual leaders of the village other than elders, maybe the spiritual leader could bless the baby and give the child skills or help it grow up faster ie less nursing time.)

Also, how about pets (like maybe a villager captures a parrot from VV2 and keeps it), livestock is a great idea once a certain level of technology is reached.