And if that was a late hit, then the NFL does just need to abolish the pass rush. A late hit is not a hit that happens at any point after the QB releases the ball. The ref has to be able to perceive that there is an opportunity (i.e. enough time) for the defensive player to do something different than connect with the QB. In this case, there simply wasn't.
Gotta disagree there.
The point is, he didn't just "connect" with the QB. He had time to wrap his arm around Palmer's leg. That's easy for anyone to perceive, even a referee.
That means he could have at least tried to stop himself. But he didn't.