Personally, I don't think the series went for as long as it needed to in order to flesh out those details but there is one episode Of Shadows and Skulls (Season 1) when she teams up with Skeletor to overthrow Hordak. The only problem with that scenario was that cliche "no honor among thieves" Shadow Weaver was using Skeletor as he was her & in the end, neither one of them managed to come out on top. Shadow Weaver has always seemed to me to be a self serving shallow evil sorceress. Throughout the series, she seems bent on collecting & mastering all sources of magic & thereby ultimate power (for she feels superior to Hordak but pretends to be subservient because it mostly suits her needs). If she knew of the Crystal Castle's existence, like Skeletor on Eternia trying to usurp Grayskull's magic, Shadow Weaver would be constantly trying to destroy Lighthope & take over Crystal Castle & its magics for herself. In that sense the PoP series would simply have been the flipside of the Masters series. There is that brief interlude in The Price of Power when we learn of her past before she became Shadow Weaver. It suggests that then she was an individual much like Ariel in The Anxious Apprentice who was good at what she did but not good enough & was always under-appreciated. But the moment she trades her humanity & soul for ultimate power I believe she ceases to be human which is why her face is always in the dark shadows of large hood. Are there moments when we should empathize with her because she grieves for the human soul she no longer has? Who knows? She doesn't spend any time introspecting but it's clear when she's finally confronted by her old teacher & mentor (before she became Shadow Weaver) that she is not nearly as powerful or indestructible as she thinks. Perhaps because she knows this anyway, she's constantly trying to unearth, awaken, harness ancient relics of magic so she can control them & thereby be all powerful & unstoppable.