One thing I have noticed - corn seems happy to spawn in places where bananas once would dominate (in jungle patches. They don't have woods on them, of ocurse, but they sneak in amongst the trees.) Furthermore, the Hacienda Cannot go on floodplains or volcanic soil. Bigger restriction than one might think. I made a little mod for myself that adds 2 "alternates" to the factory that unlock later (and have projects to swap between them.) The Steelworks, which consume iron per turn in exchange for a bigger production boost in that city (+2 per district) and the Chemical Plant, which consumes niter and adds production to improvements like farms, plantations, camps, etc. Kind of a fun twist because it makes you hunt for those late game.