With the injuries to Anthony Barr & Eric Kendricks last year the lack of depth was exposed so it's no surprise that another young guy was added.
From the video I can see why they went with him.
He's a converted quarterback and with that the need for time is still a factor. So it's good that he won't be counted on for much more than special teams reps early in the season. (and hopefully late in it as well!)
He was a player that was identified during the mock-a-thon but I'm not sure he'll end up being better than some of the linebackers who are still on the board.