I think the major question we need to resolve is why the Knights and Kuche have cities with no growth. Either they've focused on production, science (with a specialist) or just simply founded their second cities in spectacularly poor locations. I think that the Knights originally had Tintagel focus on science when it had no growth at pop 1, but now at with that city pop 3 and the philosophy race (presumably) handily won, why has it stopped growing? I don't think there is much to be gained right now in sacrificing growth for production or science. Either they (either team) have an urgent need for units, or these cities are build in food-poor areas and they lack workers- that might be the case if they wanted to put their second city down ASAP for whatever reason.