Pretty nice.

The beginning has a lot of "busy work" though where you have to repeat certain actions everytime you restart the level: "headshot that and that, lure that, head shot, pick that up, go pipe" in a quite specific order which there is noway around really (not much alternative choices or paths) . This is especially pronounced if one were to always go for the grenade launcher (I somehow missed that sidepath totally on my first playthrough) .

Is purposeful that if you kill the bartender and then enter the vent right away, the backup will just "stand there" ? From what I can understand they start walking towards the point where you are when they spawn, but since you are in the vent the Reaper essentially "doesn't exist" at that moment so they don't have any place to go. They could at least patrol around though IMO.