As far as what happened with 1313, ex members of Lucasarts were interviewed in one of the latest issues of Gameinformer, and basically said that LucasArts were taken over by movie people who had no understanding of how game development works, and would give them ridiculous tasks with barely any time to work on them. It's easier to whip something up for film than it is for video games, because bugs ruin a good game.
They would literally get started on a game, and would cancel it halfway through development, and this happened several times. I've got the magazine somewhere, I'll see if I can find it.