OC Westbrook's "improved" defense is really just over-aggressively going for steals. Often times, a better defensive positioning or cutting off drive is better suited than going for steals, as shown in today game vs Rockets.

Siakam trips Embiid after Embiid smothers him defensively

Lillard sinks the triple after Westbrook bricks the triple

Franz Wagner splits the Spurs defense finishes with the euro step scoop in transition

Westbrook Drives, Ibaka Blocks, Durant Ice. Cold. Three