There are also some special features implemented there, like cameras, disappearing spots, etc.
I like the idea of camera mechanic to gather intel. It is done pretty well in Phantom Doctrine (xcom-like strategy in CIA vs KGB Cold War setting) - player soldier interaction with mission objectives from adjusted tile.
I've seen Bureau 11 implementation, can't say I totally like it - making it with special damage type is all what mod can do, but it is not my way.
In new release I have a special mechanic to gather samples, other interactions like that can be done rather easily with engine change.
But for gathering intel, I think I will have to make something different...