Watching the video on the play in question, my biggest question is the quarter roll TL did. As pointed out, if he'd been able to throw the pass without have to regather it would've been fine. 

So was the quarter roll because he was supposed to read the whole right side first? Did he just mess up? Bad play design? 

I can't answer any of that, and that's why I try to stay away from too much criticism of individual play calls.

---