I think they had two choices,
1) Play Conservative (which fans would blame Capers for doing) with a cover 2 over the top with tight physical man coverage underneath which I honestly don't think plays to the Packers strengths as they're missing Burnett (deep coverage is not Hyde's strength) and the Packers CBs aren't the more physical while the Chargers WRs can be fairly physical (lose that match-up) and they've got veteran targets while the Packers have fairly young CBs and LBers that aren't the coverage type (again probably lose that match-up)... so unless they waited almost all of their DBs on the field (which they had anyways due to injuries, only Goodson and Gunter didn't play defense) this might not of been the best way to go.
2) Play aggressive, attack Rivers and the OL, force Rivers to get the ball out quickly which he was forced to do in this game, just him and his targets kept making it work, even in some very tight coverage and with Rivers getting hits right after he let the ball go, the Packers were beating the OL, but weren't beating Rivers quickness and his targets skills that they were just better than our DBs, but the defense was forcing them to make quick moves and not letting them attack down field too often.
It really was a lose-lose for the defense, as Rivers showed he's CLEARLY the best QB that no one talks about and might be in the elite QBs of the NFL with Rodgers, Brady, Brees and Peyton (grandfathered in), just that Rivers hasn't had the team around him to make huge post season runs like the rest of these guys.