First no one should get overly excited about his prospects having very little football experience. That being said he is an intriguing prospect to have the coaches try and develop. If he can make it to the practice squad, that means the coaches were still enamored with his athleticism. That will buy him another year and another training camp to learn football.
Basically temper your enthusiasm, but at the same time, there is no reason to slander this kid.
I can see why they would want to try him at tight end and I can see why they moved him back to defensive end. He is a blank canvass, and you have the opportunity to try and shape him into whatever you want him to be.
To turn him into the next Antonio Gates would be wonderful, but extremely difficult. An easier task would be to create a situational pass rusher. Then to turn him into a well rounded defensive end. That might be the easiest position to learn in football. You basically teach him some pass rush moves.