I think you're right on with the team needs but no team goes into a season with all their needs met. And, as you pointed out, a few really good players can mask other weaknesses.
I'm sure pass rush and CB will be the main targets. After that i think it's who's avaliable via free agency and the draft at ILB, oline, dline and secondary.
I think adding 4 quality starters isn't too much to expect from free agency and the draft. We've got the money and picks to add a lot of competition at those other needs.
Also, we can find decent starters at RG and KR with some mid round draft picks that could really help.
If we can add some more pass rush and another CB who is good, other defensive players will look better because of those additions. We might be one key addition to OT and a minor addition to RG away from having a good oline. ILB, SS, DE and NT could be fixed with minor additions given a better pass rush and CB. sutton and ego could look better if teams have to worry about someone other than just McPhee. Rolle and some of the current CBs might look better if there was actually a pass rush.
Lastly, we've got a lot of young players that should look better next year, i mean they can't look worse. Leno, Grasu, Fabuluje, Goldman, Ego, Sutton, Fuller, Amos and Langford could take a big step forward. Some larger than others but i really doubt none of them get worse than they are atm. Even Kevin White should help to some degree. Age is on their side unlike guys who are sure to be cut like Bushrod and Houston. We've already cut/traded Ratliff and Allen. I think we've got a lot of young guys who could ascend and we will and have moved on from older guys who won't.
Sent from a spaghetti monster circling the earth