Kinda what it says in the title.
Increasing the number of AI that are in the 'clear X' radius, especially in buildings and other places- such as churches and outlying sheds. this is coming from a side mission that myself and a group of others did that had -to me- a higher than normal count of AI stationed in the buildings, making the experience of clearing the town a lot more enjoyable and tense as we didn't know what to expect
the experience went from normal building clearance techniques -kick door in, charge through rooms, take 1 AI down, the building is clear. to something more like:
-Sneaky breeki, creep in the building, take 2 or more AI out in one room, move upstairs and there are 2 more AI to greet you then the building is clear.
Not sure how difficult this would be to implement in the game, however it would make the experience of clearing the buildings a lot more tense than it currently is.