Bills rush D looks exactly like the Chargers. DL's getting pushed around, zero penetration, RB's hitting huge gaps at full speed, and the entire responsibility of stopping them lying with second level players.
I get the point of the two-deep shell concept, but I hate the inherently shitty run D that comes with it. It's basically a recipe for letting shitty teams hang around in games. Bills tackling is better than the Chargers and they are playing with a lead more frequently than LAC, so they get away with it a bit more, but it looks every bit as horrible to the naked eye.