Imagine a city founded in an area full of hills, without a river. This city would only have the +2 food from its city square and no way to get any food from other tiles. So it would be limited to size one (just forget about the granary and hospital for now, please).
I ask myself what the 'hill' tile represents in civ5. You can generate production and trade goods there, but never any food. Remember that you can even get some food from desert and tundra. Seems like the civ5 hills are made of only barren rocks and some valuable minerals in between. Plus no animal live whatsoever. Is it like Mars or something?
From my point of view, there should be some way to allow hills to produce some food. Many regions in real life that would be best resembled by 'hills' in civ5 are producing quite some food. At least more then frozen ground or deserts.
I ask myself what the 'hill' tile represents in civ5. You can generate production and trade goods there, but never any food. Remember that you can even get some food from desert and tundra. Seems like the civ5 hills are made of only barren rocks and some valuable minerals in between. Plus no animal live whatsoever. Is it like Mars or something?
From my point of view, there should be some way to allow hills to produce some food. Many regions in real life that would be best resembled by 'hills' in civ5 are producing quite some food. At least more then frozen ground or deserts.