I'm puzzled after Game 4, too. How did the Heat come out with so little energy? Part of it is that Butler is clearly hampered out there. A hobbled Butler + no Herro is going to bog down the offense. But, the Heat should have come out intense. They were facing a Celtics team without their emotional leader.
I mean, the Celtics played a pretty mediocre game offensively, and they blew the Heat out just due to defensive energy and the Heat's submission.