Interesting article.. thanks for sharin' it. A fair nuts & bolts type diagnosis.
Article even went into the specific backgrounds (and contrasting successes) of ethnically mixed coaches.
One oversight is Spoelstra, characterized solely as Asian. His father is a White guy, who was front-office NBA (Nets, etc). I gotta assume that a dad like that was a major player in Spoelstra's development within the sport. Not taking away from any side of Spoelstra's background, but the guy has a White basketball lineage to be recognized in a racial analysis.