AWESOME!
There were two problems with D:OS that, for me, stopped it being stand-out excellent; no true single-player and the tone of the story universe was just a bit too jolly/lighthearted for me. Everything else I liked.
From the publishing blurb, the story/tone is supposed to be darker.
From what you're telling me, it has true single player.
This makes me a very happy camper! Thanks for the info again, Raze.
TLDR: I'm in!