Yeah, this series on offense JB has struggled early in games and turned it on late. I think part of that is a product of his strengths/weaknesses as an offensive player. He gets tunnel vision, he gets amped up, early in games teams bait him into bad decisions, they are fresh to trap hard, they are willing to be physical. His strengths are his elite athleticism, and straight line driving, late in games teams are tired, he gets the edge more, the doubles are slower or not there, his defender isn't as willing to take the contact etc.
The next step for Brown is tightening his handle and improving his vision. He's inconsistent in both which is what holds him back.
on Defense he's been excellent almost the entire series. Outside a bit in Game 1 and the end of Game 3, I haven't seen his usuall achilles heel of off-ball defense hurt him. Some of that may be that BKN runs garabge offense, but it may also be that he's focusing on it in the playoffs.