Polygon has released a new article today, in which they interview Ed Beach about some of the design choices in Civ7. He talks about the decision to split leaders and civs to allow more diverse/interesting choices, that they had 2 historians on the team and consulted with the Shawnee, that they considered the opposite with civs and leaders (1 civ with leader switching), but decided against it, and a couple of more details. You can read the article here, and discuss it with us in this thread.