That's really cool! Would it make building the highway harder as you need the resources they drop?
I actually really enjoyed the BT fights believe it or not

. They were visually amazing and it was fun when you could use the blood mist to make normal bullets really effective. I know I am the exception here though!
This is like the mules and terrorists you could wipe them out permanently but you had incinerate the bodies but then they wouldn't gather resources you needed again for the highway and other structures.
This is what's so good about the game nearly everything you do changes the map in some significant way affecting gameplay choices later down the line.
Again players that just bee line the story would probably see none of this. It was very revealing when a bunch players whined about delivering Mama across the map. No doubt these were the players that hadn't built up the highway or zipline network so they had to walk the whole way!