Moddability is definitely an issue. The need for 3D art in Civ VI is a huge obstacle for most casual modders like me. Creating wonders and buildings for IV and V was a piece of cake. Secondly Civ VI is pretty well loaded with content as compared to Civ V and even Civ IV. When I began modding Civ V, I did it because of the lack of content. Civ VI doesn’t really need a whole lot to be honest.