i still wont buy it
good. considering your name, i don't think i'd want to ever have the risk of interacting with a city published by you.
Watch.
In 3 years, bigger city sizes.
Maxis will never make the cities bigger. There are several posts on Reddit going into detail on why this won't happen (mostly cuz engine doesnt scale well). The modding community might be able to make it happen but it'd be a colossal engineering task.