I agree about the robots, it doesn't fit in the time period at all. The game follows more of a Warcraft time period, not a Starcraft period. Robots would be nice, in their own mod, but not real fitting with the current factions. Nature on the other hand would be awesome, buildings that were like giant plants, which could heal themselves over time slowly. Also lots of animal summoners, wolves, bears, eagles, falcons, lions, elephants, etc...