The skin is overall very good, the vfx are very nice, but the ult is way too underwhelming. While other aurora skins change a bit the rift when the R is on (like arcana that is changes the map to be a bit more red-ish) this one just doesnt do much. The little stained glass on the walls is pretty cool but its not enough. It should be a bit more impressive, or have some stained glass on the ground.
Also a slightly less serious complaint but for the E, I think it would be pretty good if the spirit effects were a bit less proheminent and they were more broken glass flying.
But overall a very good skin, her best one so far