but therein lies the difference. statistic applies mathematically to numbers and data points collected and averaged. a ranking, is a ranking, is a ranking. its opinion based on different peoples thought processes. if we want to take a series of data points and use that to calculate averages etc., then that would make more sense than saying the middle tier of some rankings (no factual data, but opinion based) is the middle 50%.
and my point with your argument was that your opinion is that 9-24th spot is average, but in the NFL there is a huge gap between 24th rated player vs. 9th and saying, oh, they are all average. if Darnold is the 24th ranked player, you can't say Dak and Darnold are both average and thus about the same. that's too wide range of a difference in rankings even to say its all average, specially that there are 32 starting QBs.
and even in the 11th 12th range if you want to look at QBR only, then 16th player would be median, and this would put Dak above median. 11th ranked QBR is not the average of 32 QBs ranked. probably a better way would be to take QBR of each QB (or top 32 starting), average it and then that would be truly the average. and subsequently each QB would be above or below average by x margin of average QBr. again, the notion that 11th ranked is average is mathematically incorrect.
and yes, I am also looking forward to the new wrinkles in offense. I don't expect much difference, as we can't jus tear it apart and rebuild, given that would be a two year process at least.