I've gone over this play a bajillion times, and though I think I can see a mix-up on the line, I'd still say Casey had plenty of time, and the ball should have been out and not double-pumped.
But going back to the OL part, it's hard to know sometimes. One thing I'm absolutely sure of is that Christian Jones was not manhandled. As the play develops, it becomes clear Jones intentionally comes off his man to picks up a blitzer (who looks to be blitzing run, but picks him up nonetheless). The guy blitzing comes up the gap Angilau is supposed to plug on his pull around that's helping to sell the PA. Once Jones shifts to that, Angilau continues down the line, appearing to focus on the guy Jones turned loose. Then the guy who hits Casey loops around from the right and Angilau is left with a choice. He should have probably grabbed the inside guy (who ends up hitting Casey), since his responsibility was inside to begin with. ORRRR, Jones should have never came off of his man, and let Angilau pick up the blitz, as he IS coming around. But it still doesn't solve the fella looping around from the right, and the fact is that guy is coming far too late. Ball could have been out, but also that defensive play was perfectly timed.
It happened, coach it and get it right.