Well look at it a little different for a second.. he played very well over the course of the past two years and wasn't negotiated with at all during the season, but seen other players around him get reupped with a contract.
Then, this offseason wasn't offered much in terms of a contract offer and go back and read the agents comments, the last two weeks their was little dialog from the Packers to Williams. Then bang.. the franchise tag right before FA opens.. so I am sure Williams emotions were a little negative about the whole deal.
You can say it is just business, but these cats have feelings as well, they are human and life changing events like having to move and a roller coaster of changes in a couple of days will have an effect.
Now, I don't blame the Packers for doing what they needed to do, it just sounds like the communication wasn't there of the plan or scope of what was trying to be accomplished.
Oh one more point, with the fanchise tag, the player doesn't get any of the money until the season starts.. in signing a contract as he did, the money was available now. Probably had a little to do with the embracing of the Browns as well.
The presser notwithstanding, I still think Williams is a class act and would have been proud for him to stay with the Packers.. to me he was a Packer person that got caught up in the numbers. IMO.