This is good stuff.
Something that may be skewing some of your numbers depending on the dataset you used is all of the players that end the season with less than 75ish fantasy points and have no chance of getting picked except for the memes. I noticed a disproportionate number of those players are wide receivers which would inflate the overall WR standard deviation even though they really aren't relevant in the decision-making process. Meanwhile there are only 8 QBs, Ks, and Defenses so pretty much all of them will show up in multiple leagues.
Something that may be skewing some of your numbers depending on the dataset you used is all of the players that end the season with less than 75ish fantasy points and have no chance of getting picked except for the memes. I noticed a disproportionate number of those players are wide receivers which would inflate the overall WR standard deviation even though they really aren't relevant in the decision-making process. Meanwhile there are only 8 QBs, Ks, and Defenses so pretty much all of them will show up in multiple leagues.