I've worked in MH with abusive men in prisons and have also been in an emotionally abusive relationship.
Bancroft isn't thought of very highly academically in my circles and I'm not a fan for the issues previously raised by other posters.
It isn't revolutionary and there is no new perspective. All human beings fall into broad 'types' whichever way you look at them and abusers are the same. Abusers aren't unique because humans aren't. If you know enough about human behaviour and psychology you can understand how certain personality types respond to situations and predict future behaviour to a certain extent because none of us are really that different. There is no 'script' other than personality types will usually respond to events in a similar way.
BUT I have almost two decades of ongoing training, experience and qualifications in MH and psychology and understand all that.
If I didn't, I'd find Bancroft a revelation and that's why it's a valuable and easily accessible piece of work for people that don't have the background in MH or psychology.
And I've been around long enough in MH and on MN to see the trends. On MN for a while it was Shirley Glass and for a while now it's been Bancroft and 'narcs'.
And it'll change when the next thing comes along. That's life. It doesn't mean his work is invalid, I think it's great for helping victims see what is happening to them.
And the OP clearly has his own issues and agenda but taking his posts out of it, I do agree that no body of work or person should be beyond criticism or full appraisal and should not result in people thinking criticism must be because the person criticising must be an abuser, an abuse apologist or a 'handmaiden'.
Then it becomes less of a valuable piece of work and veers into 'cult' status in terms of 'you're with us or against us' and that's not what his work is about nor should it be interpreted as such.