Units spawn with unique stats. Medium, Big, Behemoth and Giant Biters may appear at the beginning of the game, but with a small probability.
Mods introducing new content into the game.
New ways to deal with enemies, be it attack or defense.
Changes to enemies or entirely new enemies to deal with.
As stated in the topic - please add an option to disable changes to the range. It doesn't work at all with other mods that add different defense options.