Control and comfortable passage (Espire 1: VR Operative)

Those who have already managed to strum a few hours is clearly noticed that the game has many illogical and wrong things. For example, an unconscious person cannot finish that didn't Wake up in some places instead of gear, you can grab the wall, and sometimes the guards notice the bot far away and through walls, meaning the texture. The game obviously pushes us to go without the bodies, and even the torso without consciousness can create obvious problems as the alarm just a few minutes after his blackout, and impossible to shoot, hit again - it is useless to take the gun and stash too. In short has anyone decided how it just disappeared? With today's problems but this game is too hardcore. I can understand if they replaced the tranquilizer gun in a pistol with a silencer, made the discovery is not instantaneous, and not from afar, the outage and the ability to hide in the darkness right under the noses of the enemy, but to developers not affected...
By the way, about control - how to jump like a trailer, to slow down time in the fall, etc.? About control found nothing in the menu.
upd. - found all the same gun with a silencer during the passage, but the sense from it a little, still he did not shoot anyone the first time, if only in the head, and it's not working with the military in serious armor and those who are unconscious. Does anyone know, is there better weapons? There's the sniper rifle with a silencer, or PP?