Lets not confuse the scheme with the playcalling. I can't pretend not to be baffled by Capers's playcalling all the time. Although strangely my experience calling plays NCAA 2007 for xbox hasn't fueled me with enough arrogance to pretend I know better than someone whose won AP coach of the year, won a superbowl, or produced three different defensive players of the year. Not that if MM kicked his ass to the curb I wouldn't be thrilled or expect improvement, but that's because I know it wouldn't be an Internet message board choosing the replacement.
I have yet to see the scheme that doesn't require a 2nd level of linebackers so unless you think there are better linebackers sitting on the bench, I don't know what else he's supposed to do. You've proposed a 3-3 but not in any conventional sense as every teams implementation of a 3-3 would keep both our 2nd level guys at the 2nd level.
Your position that its Capers's fault for playing the subpar talent he's given is a very flimsy excuse to shift the blame to where you want it to be. We all agree the talent is not there "and that should be the end of that portion of the debate."