Clearly? I don't think it's as clear as you seem to think it is.
Rare agility and acceleration for a guy of that size, has shown the ability to cover slot WR's in college, and he's undersized for DE. Eventually, you'd like to see him play more on the line, but I think we're at least a year away from him having the strength to hold up as a DE. Whereas, he should be able to play well immediately from the LB position (again, dropping down to rush the passer in passing situations).