I'd be happy with any of these suggestions, but my biggest hope is for something to keep the builders and healers occupied. scientists can keep researching forever, farmers have multiple farming opportunities to increase their skill levels, but once all the structures have been built for the puzzle completions, builders are reduced to "repairing hut" and healers have to just hope someone gets sick and I notice it before they die. even parents can tell stories and teach children once maximum population is achieved.