+2 food on irrigated Plains/Deserts/Hills

[Optimizer]

In my personal, never-finished mod, I have made a radical change to food production.

• Raised the food bonus for irrigation to +2 for Plains and Deserts
• Allowed irrigation on Hills with +2 food
• Raised the production of Jungles to 2 food and 1 shield
• Allowed irrigation without fresh water with an early Medieval tech
• Increased the base cost for irrigation to 12 turns (from 8)
• Removed the Wheat bonus

Advantages from this:

• Makes the starting position less decisive, because you can mostly get decent food production
• Favours slow expansion because you need more time to develop the land
• Makes Despotism worse because other governments get 3 food from irrigated Plains
• Makes more of the world inhabitable after some work

So far, I haven't found any drawbacks.