I think it would be great if all parents had that available. The only issue I see is that many alienators suffer from some sort of personality disorder. I would imagine that, in those cases, a "divorce camp" situation might actually exacerbate the problems rather than fix them. I would think that treatment for the PD would be necessary before something like that would be effective.
It was heart-wrenching to hear about the Dash. That should tell people how damaging alienating behavior is to children. Dash was an extreme case - with an extreme ending. But even if the alienation isn't at that level it is extremely damaging.
I saw my step-daughter in those kids at the end. My step-daughter said to me recently "It's ok (Gemini3). I think my mom just says that stuff because she wants us to like it better at her house." From the mouth of a 9 yo. They see what's going on, but as children they are powerless to stop it. It's up to the rest of us to make that happen.