I've been extremely high on him for just this reason. We've needed a young big-edge for a couple of years now. Since Ogbah's back injuries began, we just haven't had a guy who could play run AND pass well... forcing us to platoon more than I would have liked; platooning gives the offense a clear sign as to what they can do against us.
The question on Stewart is whether or not he can become a high sacks guy, and I do think this is why he lost weight and came into the combine with the goal of showing the world what he could do in that area, after A+M used him poorly throughout his tenure there.
If he goes back to 280, which we both expect, he can play 3-4 end on running downs, and 4-3 DT on passing downs, and become a true 3 down player.
I've readily admitted that he is a major bust risk, and I've said that from the beginning. If he could become our starting DE and get 7-8 sacks per year, he'd be a gift... if he could reach double figures, he'll be a star,