Here's what that means in games. In 11 games with Miami ahead in the start of 4Q, Miami scored 10 TDs. In 6 games with Miami trailing at the start of 4Q, Miami scored 3 TDs. Two were in the TEN game - 7 and 12 yd drives. The 3rd in the Balt game, with Miami having the ball at the start of the 4th at Balt's 17. That's it.
I see a clear correlation. With Miami ahead at the start of the 4th (low stress), the O could score. With Miami behind, (high stress), didn't score ONE TD of over a 17 yd drive. Yes, the D failed at times, but ZERO long drives in all games while trailing? That can't be mostly D - and, no, you didn't say it was.
Even with that data, it gets worse. After the DEN game, Miami scored only 3 TDs in 4Q while LEADING. Leading in 8 games after DEN. 3 TDs. TT's not blameless, but a poor 4Q in 17 games needs addressing.