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.