I've got a simpler solution to this, which will also address short-term fluctuations in how boring a realm is:
The ratings never take effect immediately. Rather, they phase in over a period of, say, two weeks.
I don't think that's helpful or necessary, especially if this is an information tool. I understand you want to prevent people from making hasty inferences from a single data point, but
let them. It would be unwise for them to do so, but that's on them. You don't always have to save people from their own mistakes, and
most people are smart enough to understand that it's an opinion poll, players are human, and humans are whimsical. It would be subject to same vagaries as all statistical samples. Personally, the way I would look at it, a 1% move from one day to the next is negligible. However, if there's a 80% change, I'd like to know about it now because in 2 weeks it will probably be to late do anything.
