He doesn't look particularly short for a DL to me. Many times heights are inaccurately reported. Maybe he’s 6-2. Most of his film was from his soph year, also, as he was injured last year iirc.
What qualities are you looking for? For an interior DL, he’s mobile, quick, can run. He’s been pretty highly ranked, certainly pre injury. What do you see that tells you he’s not got stand-out potential?