The Bears Kept the Wrong Coordinator

After the Super Bowl in 2006, the Bears made a strange personnel decision and fired their defensive coordinator Ron Rivera. It's a move that I didn't understand at the time, and I certainly don't understand it now. Today, Lovie Smith, the head coach of the Bears, dismissed Rivera's replacement, Bob Babich. Babich inherited a defense that ranked 2nd and 5th under Rivera, and quickly ruined it. The Bears ranked 28th and 21st the last two years. Rivera, however, took over a Chargers defense that was falling apart this year and got it to play at a high level down the stretch and was instrumental in getting the Chargers into the playoffs.
When Rivera was let go, the defense was the heart of a Bears team with a terrible offense. And the man who runs that offense at the time, Ron Turner, has somehow kept his job despite inconsistent play from his quaterbacks while with the Bears. It started with Rex Grossman, and continued with Kyle Orton, who played better than Grossman, but not at a level high enough to keep the Bears in contention for the Super Bowl. Bears fans must be all the more frustrated as a Grossman was a first round draft pick, and Orton was a 4th round pick out of Purdue thought by many to be a steal. Not only that, but Brian Griese, a pretty decent game manager, was with the Bears for two seasons and didn't do much of anything. Given that Griese's strength is in short-passing and keeping the offense on the field, it's bizarre that Turner couldn't use those abilities to get enough production out of an offense that only needed to be slightly below average for the defense to carry the team to a championship.
Do you think that Lovie Smith regrets letting Ron Rivera go and keeping Ron Turner? If I were Lovie Smith, I would.