The now-annual mad dash of roster reconstruction in the immediate wake of the regular season’s final week has arrived again, taking its usual form as a controlled demolition. It’s been on the schedule and precautions have been taken, but it’s an explosion like any other – and only so much can be done about an explosion.

You’ve seen the headlines, and only a few days in, you know the general shape of this season’s nationwide upheaval. It’s a quarterback-heavy class led by top-flight veterans …