Terrible AI. you give them a task to build something and if the first resource is unavailable they will just stand still rather than go and gather the other resources. So the gathering takes MUCH longer than it needs too. Also rather than splitting up to gather resources they tend to all just bunch up and go for the same tree even when you could have another 20 avaliable to chop down. The game get pretty boring because of this and isn't worth playing, which is a shame.