So the only doc for the game is the change-log?Sails tier 2 upgrade cuts a further 25% off of sailing times and costs. Brothel tier 1 upgrade seems to only add 2 more slots (to 10).
EDIT: After reading the (lengthy) Google Docs change log I've learned that the Apothecary upgrade reduces healing costs. I still don't know why you'd need more bunkroom space. Only two crew ever go exploring anyway. (And I haven't yet figured out how to change who is the current leader or which crew goes.)
What should I do first: dungeon or trade?