I think that some nonproductive but real life behaviors would be interesting such as one of the "elderly" villagers "forgetting" say for example your master scientest (sic) forgets and tries to clean the beach when there's no debree (sic)

also at random someone could go swimming in the lagoon and it does a fountain of youth for them and someone in there 30's is now 5 and you have to wait for them to grow up again and retrain them

sorry my spelling is so bad