Rat has the skill set to be successful on the edge for us. He's got alot of strength and has quickness for his size.
Its just physics. If we want to be solid up the middle, we need one of the 330-350 lb monsters clogging things up in the middle to allow our LB's to fly to the ball better. Every successful, hell im pretty sure every team that plays the 34 in the entire league has a NT at least 325 lbs.
Ratliff, as strong as he is, simply can't take on multiple blockers consistently and get any push. 290 is light for a DE in the 34, much less your NT.
Give me one of the huge space eating monsters who can get a consistent push and tie up blockers better, move Rat to one of the DE positions and our DL would be getting alot more push up front. As it is this year, we got next to none.