The BBC podcasts /documentary are great, as is the ITV drama, but Nick Wallis who wrote and presented it didn't break the story. As he has explained several times. That was done by Computer Weekly roughly 20 years ago and then their story was built on by Private Eye,
When the trailers for the drama dropped I was feeling quite angry that it had taken until now for this issue to be aired to a much wider audience, especially given the cast was filled out with likeable TV faces, and regional accents (I was worried it was going to be the Full Monty without the stripping or Brassed Off without the brass; light and sentimental with some swearing and a bit of social realism). I watched it begrudgingly, and thankfully it wasn't a gritty rom-com; infact I was crying with anger during the final 10 minutes because I still can't understand why it hasn't been a bigger issue for more people until now.
As you've pointed out, there have been journalists/published titles covering this for a long time. I became aware via BBC Radio London reporting over the years and have always been shocked when I mentioned it that most people I spoke to had no knowledge of it at all, and if they had heard of it they were not aware of the scale of it. It feeds in to my paranoid fear that too much self governing has been allowed throughout many industries over the past decades, and it is too easy to get away with doing nothing until something goes drastically wrong; then all the work going forward is covering up the mess, avoiding blame, but not fixing shit, or changing it, or learning from it.
It still makes me angry that all this has come to general public notice so late in the day, but It's some consolation that it has come at all and those impacted by the RM's atrocities might get some relief and, finally, they do get a voice. It won't change anything about the past 20+ years though. That is gone, and it sickens me that it has been allowed to drag on and on and on until now (and it will drag on further still as more people try and wriggle out of it!).
I hadn't realised the Adam Crozier connection until this week; perhaps that's why ITV hadn't covered it more in the past (or mention him in the drama!)
Where has the main BBC News been with it? They're not much better than the Sun these days.