I’m relatively new to the game, but one of the first things I noted when playing was that there was no way to harvest rain water. In a survival situation in a tropical location, harvesting rainwater would be the most logical method to obtain and retain it… especially on a larger scale once a player has an established base and farming operation. All of the components we need are already in the game! We could use barrel scrap and wood sticks to construct elevated, open-top cisterns for collecting rain. Or, alternatively, players could craft more robust cistern bases from clay bricks. Of course this could be a more advanced crafting item.
Players could then simply refill their coconut flasks or other water containers from the cisterns.
Additionally, as an upgrade for farming operations, players could use clay to craft crude pipes to make a rudimentary drip irrigation system from a cistern to maintain water levels for farming plots. Each cistern and pipe setup could maintain a maximum number of plots (maybe 4 or 5?), so players could have rows of plots with cisterns at the end of each row.
I love the game, but one of my biggest complaints with it is the nit-picky, monotonous, and repetitive running around refilling leaves under water stills, filling containers, and then individually watering plots. I need to be spending my time harvesting resources from the islands and hunting / fishing. Someone stranded on an island like this would use the materials at hand to create the most efficient systems possible that require the least energy expenditure to achieve their objectives.
Just some food for thought!