Miami has played 35 games. They are 17-18, as close to .500 as you can get on an odd number. When does the "Heat" win and when do they lose? The key stat that answers that question is "effective field goal percentage," a weighted combo of two-point and three-point shots. When Miami wins they shoot at an eFG of 50.8%. When they lose, 49.8%. Not much of a difference there.

MIA EFF FG% MIA W'S 50.8
MIA EFF FG% MIA L'S 49.8

There is a much bigger difference in how the "Heat" play defense in their wins and losses. When the "Heat" wins their opponents effective field goal percentage is 46; in losses it is 54.

OPP EFF FG% MIA W'S 46
OPP EFF FG% MIA L'S 54*

EFG might as well stand for "effort field goal %" for that is all that defense is. Half of Miami's shots are going to go in no matter what. So ignore the offense, that is not where Miami is winning and losing. Instead look to defense to win games. If Miami had held each opponent this year to 49.7% or under shooting success they would have won every goddamn game. Ah, but defense requires l’effort and that is hard and inglorious. It's the difference between giving the other team 94 feet of hell or jogging 47.5 feet before chucking up a three. Miami is too lazy by half.

*NBA Stats.