I just read a thread somewhere were people were wondering what we meant by: "Dropped MP to save the story in SP". The answer is quite simple - choices in div2 have consequences which change the schedules of the npcs and affect the world, so the gameplay coming from making those choices would only be available to the first player who encounters it. Since it's quite a lot of work to put those choices in, it would be very hard and very expensive to provide a world with so much choice that you could cater 4 people. We actually tried for quite some time, but the effort required is just too large and had we insisted on it, we'd have had to water down other things.