Chop blocks have been a point of emphasis because they have such a high potential for injury. Easy rule of thumb for offensive linemen. If a defender is engaged stay off his legs or the flag comes out.The chop block was kind of weak but it looked like their center or guard cut Cokes down while being somewhat engaged with their right guard or tackle.
On the pick play once the QB commits to it looking like a passing play the downfield rules apply. If he pulls it down to run the pick was still illegal. This is like if you have a defensive back holding a WR. If the QB pulls the ball down and runs the defensive holding as if it were a passing play still applies.