It's really hard to say because we humans are very prone to confirmation bias and other forms of seeing patterns where they don't necessarily exist. (Anyone remember the "JP method" for the original relics, where a lot of people thought the droprate increased at certain times because they happened to get one during that time, and in turn told other people?)

It's possible there's a change that didn't make the changelog but as certain others have said, to really know we'd need to see a wider data set. I really won't complain if it was actually increased, though.