At the time, I felt it was a boneheaded move to promote a guy from the same position (LB coach) and from the same defense, over Lance. Lance had been a DC at a higher level than Sal, and in fact was hired from his DC spot (UCF) to join Saban at Bama.
Monte Kiffin raved about Lance's defensive mind and took him under his wing when he was here. Then Lance got to coach under Wilcox, who had a good resume (including beating Oregon when he was with Boise State). So, that's exposure to a lot of good defenses. It would've made sense, under the volatile circumstances, to just promote Lance, and keep a lot of defensive continuity.
Lance was right. Had he stayed, there is a very good chance he'd have saved Dooley's job.