I just found an interesting stat, opponent 2nd chance points. OKC is worst in the league giving up 16.0 pts/game. BOS for comparison is 3rd best giving up 12.3 pts/gm. For contrast, on average, OKC forces 49.0 opponent misses per game, BOS forces 48.8 misses per game, about the same. OKC allows fewer attempts (85.2) to BOS (90.6), but because OKC defense is better, their opponents miss a higher percentage.
All of this (if you can follow it) shows that their Achilles heal is opponent ORebs and 2nd chance points. Not surprising for a team that generally plays with 4 or 5 guards. They have the lowest DRating in the league even while giving up the most 2nd chance points. Think how good they would be if they didn't give up as many 2nd chance points. They gave up 19 2nd chance points last game to MIL and got only 6. That 13 point net was pretty much the game.
The opponents points off turnovers (another stat I like to track) was about even, OKC gave up 12 and MIL gave up 14. If you are going to lose the 2nd chance points battle, you better win the points off turnovers battle. On the season, OKC is best (lowest) for opponents points off turnovers with 12.6 pts/gm (tied with CHI). BOS is second at 14.0 opponents points off turnovers. OKC takes care of the ball. OKC also leads the league in their own points off turnovers (most) 22.7 pts/gm.