Tom Brady’s first two drop-backs of practice yesterday resulted in a glorified throwaway and a pass that essentially sailed to no one. Credit the good coverage. Chalk it up to an overhauled group of receivers. But regardless of which side deserves more of the attention, it was a reminder that the offense is still working itself out, and the defense is capitalizing on the momentum it has sustained in retaining its core. To be more straightforward: The Patriots defense is ahead of the offense at this point in the offseason, and it’s been years since that’s been the case at Gillette Stadium.