I strongly disagree with you... but i probably haven't seen more film on him than you did... but based on:
1- his senior bowl performance
2- his measurables (size, strenght, speed, bending the ark well, etc. etc.)
3- his motor
4- the fact that he played linebacker in high school
i think he can play that position without a doubt... although he might be a better fit as a 4-3 DE (I'd love to see him pass rush without his hands in the dirt... but again, if he played linebacker in high school he does have that "2 point stance" experience )