Does not matter in the new crown rule as the two players are at an angle to one another. Also, that would be the correct way to tackle, head down and to the side, arms around the runner, driving through them. The hit occurs because Pryor is also lowering his body position in what looks like possibly a cut (/shrug), if Pryor's body position is normal, Woodyard's head comes nowhere close to Pryor's and is exactly where it should be for the tackle(disclaimer: no I am not blaming Pryor), off to the side and in the middle of Pryor's chest.
I dont work for the league office so I have no say in suspensions. I just know if the happened to EJ Manuel I would be pissed and if it would have happened to Peyton Manning by a Raider you would be calling for him to be permanently banned.