Excessive Attack Times
I've been hit by attacks that take 12+ hours to hit. In that time, I can not Move the City, Trade Resources, or Transport Resources. Nobody seriously lauches an attack that takes that long.
I'd like to see something like a max of 6 hours, maybe 3. Any further away then that and a message should pop up saying that you can not attack a person that far away due to troop starvation.