The builders’ AI need some work, wall building is insanely slow. For example, they seem to prioritize stone lying around in the open over stone stored in warehouses, so when there’s a small pile of 2 stones at the other end of the village and there is 200 stone in the stockyard right next to them, they will go for the long trek towards the 2 stones. Additionally, they can’t plan ahead, so they make long treks with 3 stone every time to build segments of wall, instead of carrying 30 stone to finish 10 segments at once. Building right now is working very inefficiently.