I see alot of contested catches and routing his way to space.... Herbert is great, but I guarantee you that having a receiver who's always where he needs to be and can win 50/50 battles makes those throws automatic options... just let the ball go don't even gotta think. He's there and he's winning all the battles for the ball.
Keenan can shake n bake and get wide open whenever he wants. But his understanding for what the defense is trying to do, causes him to do a lot of things to his defender intentionally to get his teammates open. But he'll still reel it in if they throw it to him when he's engaged with his defender. His football IQ and skill level is so insane! If he was a low 4.4 guy he'd be hands down the number 1 receiver in the league!