I didn't see Watt as flawed last year. I would say that I saw a kid that is a very good athlete, that as a pass rusher uses his hands very well and always keeps his feet moving towards the QB, while shedding the O lineman hands. His on field drills looked quick like a 225 lb safety and not a tall OLB. LVE looked fluid in his combine field drills to me, but not as sudden in change of direction as Watt. (lets just say he had glide, but not as much suddenness )
That would be a good find to compare video of their on field drills at the combine.