Seems to me that many of his missed lay ups are because he doesn't go up strong. He is mostly a below the rim player despite his recent high flying dunk.
Worth noting about this shot, he drove thru the entire Miami team, all within a step or two from him, while all the other SU players were on the outside unable to help - slick, slick, slick.
The layups Ennis misses are crazy angle shots with lots of finger spin. I really think at some point in his career he will start making these types of shots. He may not show it on his face but I think he still has freshmen jitters disease which is causing in to rush his shots by a few degrees.