Pettis had this problem. He uses way too many steps to get open in Kyle's scheme. Trent Taylor does as well. That's probably one of the main reasons why he got benched. A play that comes to mind from this season is that final throw vs the Cardinals in the opener. Trent Taylor threw off the timing of the play on the out route by making way too many moves, which completely threw off Jimmy's rhythm and timing.
Davante Adams is the best route runner in the NFL right now, and one thing that makes him special is that he consistently beats press with one move off the LOS. That allows his QB to see him open earlier and get him the ball.