I think recency “bias” is actually really important in terms of monitoring prospects. Guys who are taking steps and making progress vs expectations/draft pedigree do deserve to rise in the rankings relative to others who had more static seasons or failed to progress as much.
It can all change again the next season too. These are data points on a curve. You watch the slope and extrapolate, but there can certainly be outlier seasons in either direction that skew the extrapolation. Still, that’s the data we have up to that point, so it’s what we go with. If new data changes the rankings the next season, so be it.
It’s better than just continuing to rely solely on the hopes attached to draft position when the player was 17 or 18 years old.