I understand that the game is about stealth and professionalism. But I think the way the game deducts from your score so heavily for certain actions is at odds with the freedom of choice it claims to promote. I can see them docking you points for mindlessly killing mobs of civilians. But for killing anyone that isn't your target? Even armed sentries? That seems excessive. Perhaps if you simply got far less points for killing guards than your main targets.
And I'm not talking about spraying a crowd of shoppers with a machine gun. But if I managed to stealth kill a building full of armed guards using only a kitchen knife, I deserve to be rewarded for that rather than punished. Especially in a game that promoted a diversified approach each mission. But being punished for deviating from their predetermined play style just doesn't jibe with the "freedom" they are selling.