Simburgur

The game will definitely be playable offline, and there will be a single player campaign.

Thanks for your pledge!

1. Yes and no. Yes because, well, it was pretty awful all around. There's no denying that and no excusing it. But we simply had no other choice other than not releasing the game at all - the entire team had gone several months without pay and various other things were already in motion, the boxed release being one.
2. We attempted to do that when releasing this DLC and get very little traction with the press, both traditional and enthusiast. A 'complete' edition later after all planned content is released may be something else we try, but that's still a while away!
3. Can't say for sure right now. We've got some free content already in the works though - more info in this answer.

Better - full mod support!

Succubus!

And probably :)

PMing you my email.