Furthermore, you can't even place improvements outside of your territory anyways.
only forts
Why are they giving the citadel a culture bomb ability, aren't they powerful enough already? For one thing the AI will not use them properly, which makes the human player have a huge unfair advantage. I mean the AI does not even build regular forts let alone citadels. Unless it actually does now, and if so, not spammed and scattered all over the countryside.
I watched the video, but I am still not sure if I like the idea.