Regarding the documentary, you'd have to go a long way to find something that JKR has said that doesn't sound entirely reasonable.
If they're thinking of doing anything resembling a hatchet job, I personally think they are doomed to failure.
And not just because of what she has or hasn't said. But because any kind of portrayal that isn't rational, can be spotted a mile off.
We see it on here all the time. The giveaways, the tells, and also, of course, the lies and the hyperbole.
People have wised up. However irritating it might be for her to be misrepresented, I genuinely don't think it would have the influence they would hope.