Buyer's Remorse?

[Outlaw Josey Wales]

Another benefit might be to limit the number of troops that can stack in a bunker or pillbox or similarly named defensive construction made for a certain number of men.

Then, you are getting more in the line with Panzer Battles or Squad Battles.  On PzCs level, there would be a lot of bunkers in that amount of space.  So, more troops would be in there.