I am of the opinion that NE *did* want to lose the Miami game, but it had nothing to do with Pitt. It had to do with the fact that Jax, clearly the worst of all the playoff participants, were already locked in as the #5 team going into that game. By losing, NE would guarantee themselves the #4, which would give them an extra week to prepare for that game. Had NE won, it could have been Pitt or it could have been KC. It was not fear of Pitt (which is laughable. I will go to my grave convinced that NE would have beaten that team by 10+ points in last year's playoffs), but extra preparation and rest for their playoff game.
With regard to this year's final game, I really don't know. Things are so up in the air that any one of 4-5 teams could still make the show, and seedings aren't even close to finalized, unless both Denver and NY win. With that in mind, I would choose to rest guys like Warren, Seymour, Wilfork, Brady and Samuel. Probably both Dillon and Maroney, too, but that might be hard to do with only two active RBs. I think Harrison should play a half since he was out so long. Momentum isn't as improtant, IMHO for a team like this that has won so much already.
BTW, I do fear a matchup against Denver, but I think that the rest will do he team good. NYJ? Bring 'em on. I still think that they suck, and that their first round opponent will knock them out convincingly.