They were changing the offense to deemphasize Randy. Plain and simple. This is why they didn't target him and why they are going more to the young TEs and even the RBs.
Randy knew he wasn't going to put up phenomenal numbers this year and then was going to hit free agency where he wasn't going to get the offer he wanted. Not from the Pats. Not from anyone.
Anyone who thinks he was going to give it his all and just play out his contract and keep it in house and be a rah rah guy during all that hasn't paid any attention to the kind of guy Randy is or pro sports in general.
Plus defenses have figured him out. All you have to do is double him or put Revis on him.