If they make Indian (native american) setting they could also concentrate more on melee combat, which would make the combat more varied. They could choose the Indian wars during 1800-century or the England-France war during 1700-century that took place in the northeastern parts of US and Canada and included different Indian tripes on both sides. The Last of the Mohicans -movie would be a good source material if they choose the latter one.
"The rumours of my death have been greatly exaggerated."
- Single-player Game