I've watched the hit about 10 times now. Pateryn's head was down trying to follow the puck, which is bad hockey IQ but we suspend players for headshots when a head is down. Shaw didn't hit his head with his forearm (instead he bonked noggins) but he definitely rose up on the hit, which is why their heads smacked in the first place. If he tried to hit him square they never would have smashed skulls. Certainly not the first time I've seen Shaw try to hit someone like that. If Pateryn was shorter it would have definitely been a head shot.
So technically no, Shaw wasn't doing a predatory hit. I don't think it was too late either. But Shaw rises on most of his hits which is what bothers guys like Pateryn. I don't think Pateryn should have reacted the way he did, and if they decide to go after him for punches while Shaw is down? Sure. But when I see people who I'm pretty sure are intentionally reading his comments incorrectly because I know their comprehension of English is better than the President of the United States, where they can't understand he was first answering when he thought Shaw was knocked out, and second when he realized Shaw was knocked out, and other folks saying they can't wait until he's hit and bringing up his wife like that's relevant, to defend the homophobe cheapshot artist, I'm gonna roll my eyes and call it.