Suggestion:

Move the Granary to Harvesting alongside the Garden, and allow them to be built in any city.  (Currently, can only build Granaries in cities with special food tiles, Farm, Apiary, etc., and the Granary is learned from Farming.)

Reason:

The change to Gardens now allows only 1 per city, and increases the output to 3 Food.  You will not be able to make a "mega-Garden" city to feed your empire.  Since the Granary improves food production by 25%, this would allow a city with only 1 Garden as a food source to produce 4 (3.75) Food, which would allow it to support two Huts instead of one, allowing it to advance to level 3.  This could be of great use on small maps, or if you are backed into a corner by opponents.