I get the idea about LB's.........But to me they are all movable and can be shuffled about.
You can move Barron,Ramik Wilson, Littleton....Passing downs, you can line up outside, run a twist stunt, bring LB's from anywhere to try to confuse the OLINE.
I like having that 3 down LB......Like the Bears with Singletary and Urlacher......The QB of the defense that gets guys lined up, keeps the huddle under control and is that coach on the field. The Rams have not had that LB for a while.
With SUH/DONALD in front of a BIG, FAST, SMART LB........I just think it's the cherry on top for a great defense.