I would like to suggest a new ellement to Settlers..... special events
For Example
Catastrophic events such as
Tsunami
Earthquakes
Volcanic Eruptions
Torandos
Hurricanes
Floods
Fires
Each event would have negative effects but also some perhaps possitive ones to go along with it such as more productive soil etc etc
The scope is pretty much endless, if you can think of it you can probably add it.