what's killing the Saints right now is lack of talented depth

First two games with all the starters in - we scored 91 points.

In the beginning of the third game McCoy went down and the string of injuries began. Since then we've averaged 15 points per game, while giving up more points.

The problem isn't necessarily coaching, strategy, or scheme. The problem is we have no quality depth. And the reason we have no quality depth is we've been kicking the can on the salary cap for too many years.
The reason you state is a direct correlation to poor coaching and front office decisions.