I noticed something at the end of the second mission, right before it dumped me back at the main menu. When the screen went black, it said "resources collected", then "mission successful". Does this mean that if you wipe out all threats on a mission, it auto harvests the rest of the rez on the map for you? I can recall many missions in HW1 (esp. the Gardens) where i let my resourcers run for a few hours to get all the rez in the map.