I’m a Cincinnati native and have no dog in this fight. The upper video of the two you’ve linked clearly shows that Welker hit Aqib on his right shoulder/side and not on his left. He and whoever were running a crossing route, and the idea is to set a “moving pick” on the defense.
I remember in the Collinsworth era in Cincy that we were regularly called for pick plays. I don’t know how they determine the difference between a crossing route and a moving pick. Back then, I’m pretty sure they didn’t have collisions being part of the design.
In any case, you can make a case for Welker trying go under (Aqib’s right side) Aqib and not into him. My guess is that Welker as a long time vet knows not to just blatantly take out a defender.
I’ll be surprised if there’s a fine. I don’t see how you can prove it.
There is no way there will be a fine - there wasn't even a flag on the play.
It was a pick, and it is against the rules. Everyone knows it, even the folks that compare the play to edelmans earlier hit.
At some point, defenses will take enforcement into their own hands. Some receiver will think he is going across the middle to bump a dback and won't wake up for a week. Then maybe the league will get involved.