That was a great episode indeed. Although I gotta be honest, I don't really care (and I think neither should the devs) that people are not finishing the game, they still bought the copy, and there are still people who bought it and are actually expecting a bang for their buck, which they will complete.
Making the game shorter would make those completionists (or those who at least see the ending) feel as if the game wasn't worth it for their money and will choose not to buy it again, leaving less resources for a follow up game, which limits the game further.
Plus, as Kyle showed at the bonus bit, devs do love to put those things in. Specially Kojima.