Currently, water is needed a lot. However, one can simply port back to boston and steal boston's water. This is a silly mechanic to gather water. How about adding wells? you can use a woo woo rod or something to find it. Or just let players build it freely. Would be somewhere around the 1500 proficiency requirement?
Sorry for the suggestions spam lol. Just had several ideas tonight. If there's a place where devs have had a "coming soon" and any of these are in it. Please let me know!