Although irrelevant once more you have been proven to be wrong.
Zis has a barrage ability that use H.E. round instead of A.P thus claiming they "are not represented in game at all" is another mistake from you part (but who is counting).
Truth is, that is a barrage ability only for that anti-tank gun. However, that simple ability with the Zis does not represent the five other anti-tank guns which are also capable of using HE shells, with the exception of the Raketenwerfer.
Other than the barrage ability, anti-tank guns in this game only use AP shells cause if they had HE shells as well, they would be more likely to kill a model rather than miss and hit the dirt almost all the time.
So Katitof has been able to make his point that this game does not throw in the stuff from real life, because if it did. You would definitely see a Panther break down in the middle of combat.
Besides, the only thing close to a fortification is a ditch in the ground with an MG called a bunker. The British on the other hand is basically a support weapon surrounded by sandbags. Now if you want a real legit fortification, Poznan Citadel would be that fortification. Everything else would deemed as a defensive position specializing in a certain anti-unit role.