I wouldn’t say the problem is with their length or simplicity. I’m sure I could enjoy a short anthology in one of these universes. The bigger problem is the fact that its embedded into a game, effectively breaking the pacing and flow of both the written text and the game. Ideally, this would at least allow you to use environmental and visual storytelling alongside the text, but this is rarely done well enough to justify all the downsides, so you end up with the worst of both worlds.