I'm kind of interested in picking this up for the single-player if the story/direction is decent, after maybe all the bugs are hashed out.
My problem with Warband single-player is I've never gotten through more than a year in-game. By the time that point rolls around I'll have a kingdom, mostly hit the level soft-cap, be decked out completely and then the game becomes a slog with endless battles and the sieges in this game have always been crap.
I've also never had more than ~100 troops while later in the game vassals can start roaming around with 200+