Economics had a big affect on his not signing, the same as economics had a big affect on re-signing Gay, because he was inexpensive.
As I said before, Lebeau can stay or go, the same with Haley, if they go, the new hire will know enough about football to put a good product on the field. You don't get to coach in the NFL without knowing a little something about the game. My debate with all the "Lebeau must go" crowd is that everyone thinks its a slam dunk that the defense will be better once he's gone and the defense has had two down years, really? If someone held a gun to my head and asked me if his replacement will be able to maintain the excellence that DL has maintained while he been the DC for Pittsburgh, I would select "No way" as my answer.
Is there a DC that has had the same success over the past 8 years or however many you want to count that DL has had? Which team has maintained a defense in the top 10 as often as the Steelers? Seattle? Uh-huh 49ers? Uh-Huh Anyone in the AFC East? That's a joke Giants? Maybe Dallas, Skins and Eagles? Nope NFC South? LOL Etc., you get the idea