Some New Year's NET Insights

[English]

I assume you're looking at unadjusted efficiencies, where State is ranked #4 offense and #12 defense (Duke is #7 and #3)?

But in KenPom's adjusted efficiencies, Duke is ranked #2 offense and #3 defense, while NCSU is ranked #16 offense and #49 defense. Of course the difference is mostly attributable (as you point out) to strength of schedule, but I'm not sure how much the unadjusted efficiency numbers are worth in evaluating team strength.

They're unadjusted in the NET rankings, so they may be worth something in this thread*.

* Net efficiency is one of the formula components

[Ian]

While a huge improvement over the ridiculous RPI, NET does seem to have a major flaw emerging which is the unadjusted efficiency numbers. Which is basically the same as a scoring margin since scoring margin is just unadjusted efficiency margin times number of possessions. By having a scoring margin (even capped at 10), and another criteria which is basically scoring margin again, is just double counting scoring margin, making it the most important factor.

Which unsurprisingly why NET seems to overvalues teams that have a lot of blow out victories over weak schedules. Houston, NCSU are the most prominent examples, Texas Tech is a lesser example.
Conversely, teams who've play tough schedules and hence aren't able to have large scoring margins are over-penalized, examples are Kansas and UNCheats.

They need to count either efficiency margin, or scoring margin, but not both.

[camion]

While a huge improvement over the ridiculous RPI, NET does seem to have a major flaw emerging which is the unadjusted efficiency numbers. Which is basically the same as a scoring margin since scoring margin is just unadjusted efficiency margin times number of possessions. By having a scoring margin (even capped at 10), and another criteria which is basically scoring margin again, is just double counting scoring margin, making it the most important factor.

Which unsurprisingly why NET seems to overvalues teams that have a lot of blow out victories over weak schedules. Houston, NCSU are the most prominent examples, Texas Tech is a lesser example.
Conversely, teams who've play tough schedules and hence aren't able to have large scoring margins are over-penalized, examples are Kansas and UNCheats.

They need to count either efficiency margin, or scoring margin, but not both.

Flagrant 2. You used "over-penalized" and "UNCheats in the same sentence.

The grammar police are never around when you need them.