Mackey, you don't know stuff :).
Firstly, you've uncovered the game logic for the level. This is the rudimentary game logic that tells the level how to play out. As in the player walks into an area, spawn some guys. OK when the guys are dead, play a gag, etc.... Every game on the planet has this level of logic to the game flow. All the combat that occurs in the camp, with the exception of when to spawn guys and when gags play is unscripted.
Also, the game's been in development for 18 months, not 3 years
Also, the reason we've added an extra layer to our scripts is because it makes the level way easier to work on when you want to split the work up amongst multiple people. This way person A can work on section 1, while person B can work on section 2, etc... It actually speeds up development. :).