I think it's cause there's less drive and kick and more of an actual offense running, especially with Bron now going into the post for certain matchups.
Yeah, I don't know what the fukk happened, but Spoelstra coached well in this series. It all started with the defensive adjustments made in game 2. By game 3 he figured the offence out. The rest is a wrap. There is much more fluidity in the offence, which has eliminated those long draughts the Heat used to go through.
A healthy Bosh also was a huge factor. He low-key played better than Wade in this series.