You say that all enemies stayed in the same position, but I see in the second image two of the bodies are in different positions. It looks like two of them did try to move in (obviously you were able to kill them before they got any closer).
The AI algorithm works as follows: if it has already missed in previous turn and does not have a good shot it will either: 1) move for a better shot, 2) wait for an interrupt
You are right, some of the enemies will try to move closer in order to hit me, but most of them stay basically at one spot. This occurs most frequently when you hide behind a fence or an object like a car. When you hide in a building the AI most of the times works great: they will try to enter from various sides and kill you if the enemy outnumbers you. So I think that maybe the calculated hit probability is is misleading the AI: If someone hides behind an object and you aim at him, the crosshair turns green. I think you mentioned earlier in another thread that the obstacle is not taken into account when calculating the hit probability. Maybe this is the reason why the AI keeps trying to kill you and misses almost all the time.
And yes, it is true that some enemies wait for an interrupt. But the majority keeps trying to shoot and stay uncovered.
I don't see a problem. If you take good cover, you should be able to defeat the enemy. That is the whole point of the game.
I think it is ok for easy and normal skill level. But pro players will discover this exploit easily and win almost any battle (i am only a casual player and discovererd it quickly). I think that very hard skill level should be insanely difficult, making it almost impossible to win when your players are outnumbered.
Your answer from the other thread: > If you overwhelmed by enemies, then you could just play on an easier level. Apart from that, I could make Ben Dabi take a more defensive attack.
Being overwhelmed by the enemy is not the problem. I manage to win most of these battles (also on hard and very hard skill level), but my Ben Dani allies are only useful as human shields: The AI will always try to shoot them, as they are standing around completely uncovered. I put my soldiers in covered positions and take out the enemies while they are busy killing the Ben Dabis. When they finally eliminate the Ben Dabis I usually have managed to kill a lot of enemies. The remaining enemies now will try to attack my soldiers, but are too weak to achieve this. This tactic is ok, but I would prefer my allies to do a better job than only playing human shields :)