Let's not mix up our facts in forming our opinions. Lance Briggs showed little or no sign of decline in his play last year. He remained among the best WLBs in the NFL. He again led the Bears in tackles; third time in the last four years, and is an above average pass defender. Of course, his tackle numbers reflect the fact that he lines up behind Julius Peppers who cares nothing about a ball carrier who isn't a QB. Funny, but I never hear anyone refer to Peppers as one-dimensional.
Frankly, leaving the extraordinary J P-P out of it, I don't know that I would take Peppers/ Briggs over Osi/ Boley, today. In this discussion, however, we are talking Briggs for Osi which brings Briggs over Boley into play. That is unless you see Briggs on the strong side; a whole other topic.
As for the similarities between Briggs and Osi regarding their requests for contract extension or trade, neither one of them has let it affect their play to date. We will have to see what this offseason brings but Briggs/Rosenhaus may be the more adamant. The Bears cap situation would seem amenable to a deal with Briggs (they gave Urlacher an extension), or to pay Osi what he feels he should have gotten (was promised?). But for Osi to do what for DaBears; rotate with Peppers?
Cheers!