I am not totally surprised at the number of players wanting the game more realistic. All the comments that compare the things in the game to real life, like the explosions effect on the surroundings, the flames and gas going through walls and solid objects, to the weight of each ammo and so on. The game already is realistic enough for some players to expect it to go farther with the realism.
Even the stories of players characters in the game seem like they are talking about real people that were involved in this battle against machines.
The high demand for more missions, more areas to explore and more types of buildings that make it seem even more realistic.
Seems that is what makes Gen Zero so much FUN to play for some of us, the mix of realistic with fun.