Yeah, I wish she'd either just release an official companion book, or shut the hell up. These little pearls of wisdom and "insights" that she trots out on a roughly annual basis are the literary equivalent of microtransactions. Books usually have a quite pleasant sense of self-contained permanence and what she's doing disrupts that.
I'm probably being an overly anal curmudgeon, and I imagine there are plenty of readers who positively delight at having extra bits of backstory filled in now and again, but as a conservative, traditionalist old fart I think she has a duty, not least to her own work, to draw a line under it and say "There. That's it. That's the finished product. Any questions left unanswered or plot holes left unfilled can be assumed to be intentional."