Just like Kayle's skins before the rework, they all looked the same. Same thing with Xerath's skins. They all look the same but in different color besides Guardian of the Sands. Everything is just needs to look better. Like what they did for Miss fortune, no rework but skin remaster.
Indeed, since Riot doesn't want to take out a skin for Xerath (4 years and looks that will be 5), I think the less they could do is to "rework" his actual skins, even Sand Guardian (It's animations are kinda bugged). But well, you and me know that Riot it's nothing but a "only money who cares about my clients" company so it won't happen because they alredy reworked his abilities and effects...
