We have no current ways or plans to go below that, is there a specific use why you would want to make UI size that low?
No, on official servers we just solve that with good old hand written rules.
This affects local servers started from within the clients, only when choosing randomly generated world. Will be adressed next week. If you want a random world, as workaround you can start the dedicated server executable manually to generate one, and then load it via the client.
Culture is generated by bathrooms and pictures with reputation.