I’d say this bit about Ashby’s playing sums up what I was thinking as I listened.
Her attack on the harp was different than most of her peers. Her style was more direct and commanding than the "blend in" harpists from the classical side. And as Ashby's many albums show, her technique and phrasing were first rate—strong improvisational ideas combined with a touching curiosity rather than just timidly adding a wash of angelic mist.
Her playing sounded more direct and focused rather than that wispy ethereal sound that you normally think of with the harp, which is nice, but can get old.