Fortifications question

[Marcello]

To clear any misunderstanding, I am asking this for more for modding and general knowledge purposes than anything else, I am not arguing that antitank bunkers should be removed from the official iraqi OOB or any other country (that would be a waste of time, considered the others far more necessary modifications).
I was under the impression that bunkers were meant to be that, bunkers (built with concrete/sandbags/whatever, usually overhead cover and all that) and entrenchements were covered by the trenches/foxholes/revetments available in the game.
While fortifications are, by their nature, non standard
there are such things as patterns, regulations, doctrine, available materials and so on.
The iraqis, for example, did dig their ATGs of course but if the info I am getting is correct they did not put them into bunkers with overhead cover and the majority of their bunkers were of the shelter type.

The bottom line is that I wanted to know if modifying bunkers to reflect actual usage patterns is something in the not do list (like issuing jeeps with pistols and the like) because it upsets balance.

Apologies if the purpose of my question was not clear in the original post.