Risky proposition. Butler has been great in this system and two lockdown corners, even if its just for another year, would be great to have. That said, Cooks is explosive and can absolutely murder a defense for dedicating too many people in the box. He'd give Brady his most explosive target since Moss and, on an offense that can hurt you in so many ways underneath, would make that unit a juggernaut. Without Butler, a unit of Gilmore, Rowe, and Jones (should be make the leap) is still a very good unit. With Butler, it's an elite unit and probably the best in the NFL (or at least up there with Denver).