So loaded up my first game with Gathering Storm. Find my first neighbor is Eleanor leading France. Few turns later discover Eleanor leading England is in the same game. Definetly left "No Duplicate Leaders" checked at game start. Feels like instead of Eleanor leading one of two civs,we have two different Eleanors leading two different civs. From a thematic point of view it just doesn't feel right. First gameplay issue I ran into though is regarding artifacts. Impossible to know if the artifact is French or English. Hopefully this is a bug and not working as intended. France and England both have other leaders so it should be a simple change.