That was quite interesting, though really Ken didn't get into the evolution of the story all that much. I can see how he'd think it not that relevant as his focus in the early stages is on the gameplay, after the crystalisation of which the story only starts developing properly. Which makes perfect sense and also reflects their experience - I'm sure they've had situations in that past where they had to cut something they really liked or spent a lot of time and resources on just because it was no longer working with the gameplay or whatever.