Here is what Miami is doing. Hill and Waddle coming off motion is providing such a speed advantage that most teams can’t react. If teams play LBs deep zone, you punish with the run or hot routes. The Saints have the speed with Olave and Rasheed and QBs with good deep balls to run this.
The NFL is a game of advantages. Motion can help read the D and give WR a free release with a speed advantage. It stretches the D and forces off-coverage. Motion WRs get to their spot faster which can shorten the time QBs hold the ball (Saints QBs have a major problem locking in and holding the ball).
I’ve been asking for Taysom motion and in the backfield on shotgun because it’s an advantage. He can block, chip, motion handoff to RPO, motion direct snap, draw, toss RPO, etc. It’s the opposite of what McDaniels is doing in some ways. It forces LB and DBs to play closer to the line and opens intermediate and deep passes. Taysom at QB is a run advantage based on blocking numbers. Taysom next to Carr with Olave in motion or Taysom in motion near Carr is an unpredictable advantage that opens deep shots and RPO.