Hi, Is it anyone else's feelings that this perma 200/200 city defence ability comes a little too early in the game? It effectively renders all previous wall buildings redundant and you can effectively build this before you've even researched Renaissance walls. The AI loves to build all the wall types which can be a massive waste of production given the difference between them and the Civil Engineering tech can sometimes only be a matter of a few turns. I have often skipped all of them to rush this easy to acquire tech. When the human and the AI gets it, it really hampers the AI's ability to take cities. I think it would probably sit better with the later Urbanization civic tech. Thoughts?