One thing you can't fault is her work ethic!

I think she's just not edited - her books are guaranteed sellers, and they have to hit a schedule, so the editors don't feel the need to edit them as closely as they would a newer, unknown writer. At least I tell myself that's why they're letting through stuff like having all gryphons talk with visually ssssssibliant ssssentencessssss like thissssssss, which drives me nuts.