With Perriman's injury, I don't see how they don't use Waller for just that at minimum. Besides the fact, as you said, he's been one of the consistent positives at the WR position, he's perfect for that role. Maybe not Torrey per se since Torrey was a starter, but there's no reason Waller can't do a 2012 Jacoby or 2014 Martavis Bryant and just come in, run that deep route, and see what happens. Even in that Saints preseason game, he drew how many penalties for the team? With his consistent improvements and play, I don't see how they don't use him this season as of now.