Good analysis. If you have 2 LBs with pass coverage ability that can tackle that is what this defense calls for. Allows them to bring corners and safties on blitzes more and makes it hard to get chunks down the seam. Now when 1 isn't in there the middle seems to open up like there is no tomorrow because you have to have the speed to hover around LOS until you identify if it is pass or run and then haul ass back if its a passing play.