My guess, these guys are no longer fighting to keep their job. They are fighting for their next job. They can't change the scheme now, its too late.
Imagine their next job interview and the AD asks, well why did you change your scheme after 3 1/2 years of failure. There is no response. By keeping the scheme, they can sell the idea that they never had an opportunity for it to work in Miami because of the cloud and the distractions and the players they weren't able to get from those things. They can say that it worked in Temple (even though it really didn't) but didn't work in Miami for those reasons. And I wouldn't be surprised if some dumb *** AD will buy it.
In Golden and Doritos mind its too late to change the defense. They are gonna sink and ride out that scheme to another job in the future. Its all those two ******s have left.