IMO, a 3-down MLB is an asset. A guy that commands the defense on all three downs, the QB of the defense. Denver doesn't have one on the roster right now, they should try to find one. Irving, Johnson, Mays, they're ST guys. DJ has the skill to be a decent MLB, but IMO doesn't have the brains and leadership to take the playcall and communicate it properly to his teammates.
They need to find some guys with intestinal fortitude, because they sure didn't have them in the 2012 playoffs.