I have to fundamentally disagree about Miller's 'rehabilitation'. Not only did Miller not 'realize they have a problem and get help', they literally spent weeks (or was it months? it kind of blurred together) running around the country actively taunting law enforcement while they were wanted. By all appearances the only thing that changed that was the genuine possibility that their movie might not get released.
And given that the WB's response to all this insanity has been stonewall after stonewall, I don't have the slightest confidence that Miller is actually doing anything to work on anything at all beyond simply finally having learned to shut the hell up and let WB do the talking.
Even if I'm wrong, I still don't think a hypothetically rehabilitated Miller should ever be allowed to just move forward again. Starting a cult to groom children is a massively disturbing act not just because it happened but because Miller even thought of doing it in the first place, regardless of stress, drugs or mental issues. The fact that their mind went to that place at all means they should never be trusted with any kind of power or authority, period.
Also, just as significant, Miller isn't the only person involved here that absolutely deserves some major repercussions from all of this. WB's own behavior has been bizarre and their refusal to do literally anything earlier absolutely enabled Miller to keep doing this shit. The fact that they're clearly now pushing a soft pr campaign to spread the idea that Miller's behavior was just 'mistakes' related to 'stress' is outright disgusting as well, especially since their grand production of Ezra 'apologizing' never even admitted to what Miller actually did beyond 'alarming and upsetting people' and endangering the success of a movie.
Bottom line for me, if this movie is a massive hit, WB (and every other studio) comes away with the lesson that it literally doesn't matter what a person has done, if you think you can make money off them all you have to do is to ignore everything as long as humanly possible, toss out a generic excuse about their state of mind, working to be better, etc, and have a bunch of employees do interviews about their 'mistakes' and 'stress'. It would deeply undermine the entire concept of accountability in Hollywood.