Ray Horton during an interview stated that on obvious passing downs, specifically on 3rd down, we'll be implementing the 4-2-5 defense. It would really help to add a player with some bulk and speed to them to play the OLB in our 3-4 base and who can put his hand in the ground and rush from DE in our 4 man front.
I hate the 4-2-5 on passing downs. It places a huge need on the rarest players in football. IE DTs who are good against the pass. There are really only a handful of guys in the entire NFL that fit that category. Dockett is one such guy, the issue is that Williams isn't. If he was he'd be a probowl level player and he's just not.
There's a reason that the best Defenses are going more to a 2-4-5 on passing downs.
Steelers go with two Antonio Smith/Ziggy Hood/Brett Kesel based on health. They then move up one or both of Harrison and Woodley to give the look of a 3/4 man front.
Packers go with Cullen Jenkins and BJ Raji, while moving up Clay Matthews.
If by 4-2-5 Horton means that Campbell and Dockett will be playing in the middle and he will walk up Schofield and the new OLB than that's fine and great. If he means that Dan williams is in on passing downs, that's not so great.
Regardless I think that Houston fits that role better than anybody. He's had experience with his hand down and playing upright and was excellent at both. He's not undersized and is stout against the run.
Campbell-Williams-Dockett
Schofield-X-Washington-Houston
I think is good enough against the run. Especially if the X is replaced with Nick Barnett, and not somebody undersized.
---------------------------------------------------------
Schofield-Campbell-Dockett-Houston
Barnett-Washington
Looks okay to me on blatantly obvious passing downs.