Kenpom Offensive ratings from 03-10: 13, 2, 13, 1, 44,13,7,1 Avg = 11.75
Kenpom Offensive ratings from 11-18: 5, 8,4,1,3,4,6,1 Avg= 4
Kenpom Defensive ratings from 03-10: 15,3,2,16,6,7,28,5 Avg= 10.25
Kenpom Denfensive ratings from 11-18: 9, 79,26,86,11,86,47,46 Avg=48
So from 03 to 10, Duke denfese and offense averages just outside of the top 10, with defense being slightly better.
Then the OAD era started and Duke's offense went to the stratosphere, and the defense crashed and burned. Now you can say that he somehow became even more of an savant coaching offense but somehow completely lost his ability to coach defense, or you can say his decisions over the last 8 years, both in terms of coaching and recruiting, have skewed toward producing better offense at the cost of reducing defensive performance.