I had Gandhi, Catalina de Medici and the viking dude as neighbour in three different games and they are kinda stuck. They create military to a point then never again produce anything. Sometimes will trade with you, and move their units, but that's it. I don't think they create a single settler (haven't seen one and no other city was created). Other civs I encounter do have more cities planned. I did find one (Pericles) that had none but their capital, but they had 0 military so maybe lost a war or something. I was wondering if the mod is bugged out somehow in my game.