I say misleading, not untrue, because you're including his NFL record and the NFL is a totally different animal than CFB. Some coaches are cut out for one or the other, but very rarely for both, which is why I wouldn't include his days at the Raiders when evaluating him for a CFB head coaching position.
In regards to Lane and his future, I'm far more optimistic on him than you, but time will tell. He definitely was the 'hard to get along with' immature dramatic douche bag in his younger days, but people change. Based solely on his interviews, I think he possess a decent amount of self-awareness and recognizes how his own character defects contributed to his demise at USC. FAU is the first college job he'll be at for two years straight without any sanctions. I think his first year success at FAU is far more indicative of his ability as a head coach than his overall record.