Going 3 TE for an extended period of time is going to hurt more than help.
Havner has been a revelation as a TE, but he is in no way a better play maker than Jordy or James Jones.
In short spurts, especially near the goal line, I think the 3 TE package can be very useful. Beyond that.... well you have much better options.
The NFL: Where Greg Jennings Happens.