I think during this round against the pacers he is playing riskier defense and gambling in the passing lanes more.
I believe this to be intentional because he looked at the pacer and thought "what will the pacers do that will give us the most trouble?".... the answer is the pacers half court defense.
So i think bron is going for steals more than normal so they can get in transition more and not face that half court defense as much.
I also think that he realizes that the pacers offense is nothing to be afraid of so when he gamble for steals and deflections and misses, he figures that the pacers inept offense wont make the heat pay for gambling.
Lebrons bbiq is through the roof and i think he is playing the type of defenses that his team needs him to play vs the team they go against