tried it. enjoyed the complexity, but not the game itself.
i'll be playing civ 5 on my death bed.

Actually it is still very beneficial to settle on hills in the unmodded game. Because it still gives +1 Production for free, which means a lot for early buildings, and +25% city defense bonus IIRC.

Glad to see people subscribing to Civ 5 mods in this day, long after 6 has been released. Maybe I'll release the mod which I've been sitting on for like 2 years...

OH MY GOD i didn't even realize this was a thing
i already settled on hills or plains assuming this mechanic was already present
u rock dude

Yes, Flood Plains are a feature like Forest and Jungle. I considered making it so Flood Plains will not be removed upon settling but in the end I did not.

Cool mod. I like how it gives more flexibility with city placement and makes settling on hills less of a best default choice.

I noticed that settling on flood plains seems to remove the food yield from the tile, so placing a city on flood plain gives less food than putting it on a grassland tile. I think this is because the game treats flood plains as a terrain feature and not as actual terrain, so flood plain is removed when a city is found. Not an actual bug, but something that the player might not realize at first.