I recently noticed a couple minor things in my game that may need to be cleaned up/adjusted, but they're not high priority issues.
Flint - A number of more modern units, like musketmen and riflemen can be built faster with flint, but the gatherer becomes obsolete with iron working and I don't see any other way to acquire it in the pedia. Even the other AI have progressed past it even though I'm way ahead technologically.
National Mint - Gives some gold, but increases maintenance cost and adds crime. Even though I have all the bonus resources, the maintenance means it's a net gold loss. There's basically no reason to build it as it only gives negatives.
Flint - A number of more modern units, like musketmen and riflemen can be built faster with flint, but the gatherer becomes obsolete with iron working and I don't see any other way to acquire it in the pedia. Even the other AI have progressed past it even though I'm way ahead technologically.
National Mint - Gives some gold, but increases maintenance cost and adds crime. Even though I have all the bonus resources, the maintenance means it's a net gold loss. There's basically no reason to build it as it only gives negatives.