The Saints D has been decimated by injuries to the cornerbacks. They've already lost their top 4 guys at that position. Their game plan against the Giants was to let their WRs catch the underneath stuff and prevent them from getting behind them. It was more of a bend but don't break strategy that worked really well (compared to past seasons with Rob Ryan as defensive coordinator) and kept them out of the endzone. If Ryan was still the coordinator, the Giants would've scored 10 touchdowns. Trust me.
I'm a Saints fan, but what had me bet the Falcons already was the Armstead injury. The Saints NEVER win when Armstead is out. BOL br!