We're all forgetting that Tank was a beast in college at getting to the QB. Also, the Niners will draft a pass rusher.
I don't see us going to a 4-3, though. Whilhoite stepped in and played nice when he needed to. Also, I think Larry Grant is still available. He was more than solid when Willis went down with the hamstring in 2011-2012. We have options.
Also, they're not cutting Aldon this season. His contract is guaranteed; now, if he gets suspended by the league, then he won't get paid or if the Niners decide to start him out on the NFI list, then he won't get paid. As far as his option goes, if the Niners pick it up it's fully guaranteed for almost $10 million. Right now, I think it's 50/50 as to whether they pick it up or not. They have until May 1st to do so. What they decide to do will let us know about Aldon Smith's future.