An idea to do with the other humans

What do You mean?

First of all I never played the campaign. But my understanding of the new human faction is that they are the terrains when they started out. This is problematic for sandbox mode when their are two humans on the game claiming to be the same people without an explanation. This is unnessary nitpicking. To make it better it makes sense to explain where the other humans came from. My suggestion is a timewarp.