We are at the "score is meaningless" discussion again with the "Three Square Meals" thread.
The main issue is, that the score for very long series is kind of meaningless because of early scorers.
Is the story still good, or is it going downhill with repetitiveness for the last 2 years?
Is the story now better than 3 years ago?
We don't know.
Steam has a 2-part scoring system. For one, the overall Scoring and the Scoring for the last 30 days. So you can see if a game got better or worse with the latest patches etc.
30 days is a bit too narrow for SOL stories, probably not enough new scoring in 30 days. So 6 months or 12 months should be enough to see how the story resonates with viewers that finished the story recently. (Well, "finish" is a strong word, they still could score with just 1 chapter read, but eh, you can't have everything.)