Please, make the city limit go away. I hate it. It is naive and stupid. The lowering of productivity is good stuff. But we should also consider increase of Crime, harder newly conquered cities maintace and difficulty in grow small and newly created cities.
Nothing against increase defender use. Indeed will make conquering more difficult. But i have my doubts about the actually advantage of it.
Make small empire have higher science then big ones would be one of the best gamebalances ever. How many here lost interest in the game after becaming the first in science (mostly coming together with stronger end bigger empire). All?
Increase gold cost by maintance of building is a good idea. But we could consider taxation of roads TI also (the bigger than empire the more complex the road network).
You forgot: Completely redo the AI diplomatic .
Increase unit cost can ruin the game. Dont do that. Will take away the power of the smaller civs to directly interfer in a larger civs. Plus it military is a column of the game.
Others comments will follow.
How do you few about the Religion mod created by me and mapfi? The Idea is to spread the true faith and get advantages by doing it. I know it is slic but i believe it caould be converted or added to the source code with some changes to make it even better. Still i wanted to know your opnion about it.