There are a couple of ways I see this playing out, in my opinion:
* With Bennett and Gronkowski being good blockers and Develin back, that may push the need of a blocking TE off the team. Bad for M. Williams.
* They could try and use M. Williams as the 4th OT/4th TE which would be bad for Waddle, Fleming, and Cannon.
* Eat the bonus on Harbor and keep Gronk, Bennett, and Williams.
* Could keep 4 TE's (Not likely in my opinion)
And because I said these four things, I am sure none of them will be the ultimate solution.