These are the Saints rushing results the last 4 games. (att/yrds/TDs)
Against the Panthers: 37-180-2
Against the Cowboys:39-190-4
Against the Eagles: 29-89-0.
Against the Falcons: 15-88-0
There's a substantial drop off since McCoy and Taysom got injured. And for a team that runs more than it passes (prior to the Falcons game Carr had not had more than 25 attempts: 23, 19, 25 respectively) that's not good.
Saints didn't need anyone else at WR the first 2 weeks. What the Saints had back then, good QB protection from the interior of the line, which was practically inexistent the last 2 games.