That's the problem with having a one-dimensional head coach. Tom Thibodeau is a defensive genius, which is clearly reflected in the defensive efficiency of the teams he's been involved with (Bulls, Celtics, Rockets and Knicks). But his focus on defense leaves his team stagnant offensively (his offensive schemes seem to boil down to "let Rose make a play"). It's basically the exact opposite of Mike D'Antoni, who can coach an incredible offensive game, but is atrocious for defensive schemes. If you could get D'Antoni as your offensive coordinator and Thibodeau as you defensive coordinator, you could probably use a sock puppet at head coach and still have one of the best coached teams in the league.
I know there's an axiom that defense wins championships, but let's face it, the best coaches are the ones who can get their players energized on both ends of the floor, not defensive or offensive specialists. Thibs doesn't seem to be able to change his team's offensive ability, and that's been their downfall; their defense has been the typical outstanding Tom Thibodeau D.