"There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self" - Hemingway
Barnes was plenty efficient vs his peers in ISO last season if you look at it on a Points Per Possession basis, im certain.
More important than that there's certainly a marked increase in his Iso efficiency from the '16-'17 season to the '17-'18 season, there's unmistakeble progress made in this area... It's like a big step up number too, from about .93 points per possession in iso to around .97
BArnes, I believe int he first 40 games last year his efficiency was really outstanding in iso and it tailed off a bit as the season wound down (The Mavs were tanking Cuban even got fined for talking about it publicly if you recall....)