That's not the new rule. Fans and players can rail all they want to against it but it's pretty obvious what the NFL is getting at with the rule.
"PROTECTION OF QUARTERBACKS
The Committee reviewed hits on quarterbacks inside and outside the pocket. In some instances,
the defender used all or part of his body weight to land on the quarterback immediately after the ball was thrown. These actions put the quarterback at risk for injury. The Officiating Department will emphasize that the defender is responsible for avoiding landing on the quarterback when taking him to the ground."
He left his feet, and drove his body into Cousins as he took him to the ground.