A recent article I found on the subject of PA in the NFL today. Why teams do, and sometimes do not, use it. Also shows a correlation in passing efficiency improvement when play action is used by any offense. Whether their running game is a serious threat, or not. I think the main thing it does is keep defenses honest, within reason.
Also, if the game is not a blowout, why pass when you can run and control the ball, making the game shorter? That's what the Titans have been doing. They didn't have Tannehill passing because they didn't need to.
The Ravens, Chiefs and Cowboys showed what an offense can do when it goes heavy on play-action passes. It’s time for the rest of the NFL to catch up.
ftw.usatoday.com