My biggest issue is just the fact that they don't have another pass-catching threat behind either of those two if - God forbid - either gets hurt. The only other thing I'm wondering is if he has an issue as a run-blocker and they're making a move to shift to a replacement that might be better suited for that if they're changing something scheme-wise, which would at least make some sense if that's the case. But again, it's the same issue. If Gronk or Bennett go down, it definitely hurts them in the passing game, although granted he's not close to either one of those players. If Harbor was still here, I'd understand it.
Otherwise, I certainly don't see him doing a Gronk on us, but if he helps Denver win a game or two, that makes it counterproductive. Had Belichick shipped him to Chicago or Tampa, I wouldn't hate it, but I don't understand shipping him there, let alone weakening their depth chart considering how much Belichick values that position.
Again, I don't think he's great now, but he looked like a guy who played well and could develop into a pretty good player while learning from two of the best. As I wrote, I liken him to O'Leary and felt like in another year or so he could have been a nice fit behind the starters. With only two on the depth chart I'm assuming a move is coming, so I'd like to assume there's a method to his madness on this one. I'm normally pretty reserved, but this one surprised me given that they had pretty good depth there before the trade.