If this story is remotely true, it will be the second year the coaching staff has been a cluster f---. That is on Belichick. Whether or not he was pressured into taking O'Brien or not, he didn't help the issue by making it harder and harder for the coaching staff to do their job.
And this article seems to confirm what many of us have been suspecting for a while, no matter how great of a player Troy Brown was, he just isn't a WRs coach. I still think Thornton could have been made into a productive WR with the right coaching. He might not have turned into a legitimate #1, but I think he could have at least become a good deep threat.