-There will be platforming and puzzle solving in the final game.
-You will be facing humans more frequently than infected, as humans are the focus of the game.
Also, not all humans you find will be hostile. Some will actually help you.
-The AI and game dynamic is explained a bit more. They want it to be like No Country For Old Men, so a single bullet will kill, but you have very few bullets to give it a "realistic" feel to the setting. The AI also uses a "balance of power" system, where they will stay in cover and try to flank you if you have a gun, but if they see you only have a melee weapon, they will rush you and try to overwhelm you with numbers. They also react based on other events that are happening. They get angry when their friends die, they warn each other when in danger, and they get frightened when they've lost the upper hand.