The second is the imbalance

between the strengths and weaknesses of the offensive and defensive sides
A single "power outage" mechanism to change the lighting situation will bring a great advantage to the defensive side. First, the attacking side is dynamic and flashlight lighting will expose the position, the second defense also has a night vision camera, although the attack and defense will be converted, but then the first attack or defense, will have a great impact on the overall game. So in the case of restricted lighting conditions, the best thing for the offensive side is to synchronize 5 people to attack, as we see in film and television, 5 person squads pay attention to different places respectively.