Yeah the thing about this defense is you can generate the pressure with your front 3. The Texans only generated 11.5 sacks from their outside linebacker spots, #1 and #2 on their sack leader board were their defensive ends.
Sheldon Richardson would, essentially, be taking the Antonio Smith role, who he actually compares favorably too physically (actually a little heavier and faster).
So this would take some of the pressure off our OLBs. Sheldon Richardson is actually my top player for us. I think it's just a slam dunk fit