I wouldn't be surprised if we, for example, initially bring two linebackers into the A gaps (let's say Parsons and Clark), then when the QB steps up behind center, shift Parsons to right end or left end and move the end into that A gap. We don't want to just stick Parsons at RDE or LDE and have defenses run at him, but by playing "games" with him, we can keep offenses from just running at him. At times, we'll bring him up the middle, loop him around a DT, kick him out to end and even drop him into coverage some. He's the Queen chess piece for whatever Zimmer does, including with the Double A package.
Imagine lining up Parsons in the gap, kicking him to RDE before the snap and moving the RDE into the gap and then dropping both Parsons and the LDE into zones and bringing the RDE and the other LB up the middle. That's four players rushing against three blockers since the tackles would initially have to hold their ground expecting the RDE and LDE to rush. Additionally, since a S and the nickel CB come up to the line on the outside, one of them could blitz from the outside to try to beat the tackle's reaction to him rushing instead of Parsons or Lawrence. That's just one example, though, of what you can do with it.