It's tempting to use those nifty tools/powers you get in stealth games, but I have to admit, there are few times where I stab some dude to death where I couldn't also just wait five seconds for him to patrol elsewhere and just escape. So, I'm okay with the Rambo approach being a marked step down in rewards compared to ghosting through a level. (I do, however, want to see Rambo take on a level with a massive silenced minigun. TF2 has one...)
I guess in the first Dishonored game, if you kill the bad guys, there's some internal logic of "these are the only people actually working during the plague, and if they die, so do their families" or something. They can't all be going out for whiskey and cigars with the boys, haha.
Take me down from the ridge where the summer ends
And watch the city spread out just like a jet's flame