Adell catches the ball if he breaks in right away, rather than taking a step back. Adell's biggest problem is getting a good break on balls hit in front of him. He even tends to play a little more shallow because he knows it's a problem.
That, being said, I disagree that he should have played it on a hop. That was not the winning or tying run and there were 2 outs in the 9th inning. The try for a diving catch, even with a 10% chance of success, shows good game situational awareness and I applaud the effort.