Ok following the the concept 0. AD is supposed you are forming colonies and settlements in 0 AD the years are slowly not like AoK, that why some buildings take time, may be some day we get a mode Turbo like AoK and AOM (?) In this concept the settlers must be try to build farms and storehouses , etc, outside of territory, this will be the first settlements outside a capital province( 2nd and third phase). But the danger to live outside a territory frontier is the easy to be razed, sacked and captured by a enemy troops, or simple, be massacred by reading troops. In the trac I read about idea the farms if is not working or people work in them( farming), lose HP. About walls, our walls are different from AOE franchise , because the turrets shots arrows and you can have units in to the top, firing arrows, stone and javelins