This will likely never be changed as it is an intended feature of this armor, not a bug. As you’re no doubt aware the Celestine Armor set is just one example of what is more broadly known as Solstice Armor (armor sets tied to the yearly Solstice Seasonal event). A fully upgraded piece of Solstice Armor has always provided a distinctive [b]white glow[/b] that [u]cannot[/u] be altered by swapping out the attached Shader. The decision to prevent the aforementioned glows from being influenced by Shaders was no doubt largely driven by the inclusion of Solstice Armor Eververse Ornaments, which feature glows that change color based on your currently equipped Subclass. If the upgraded Solstice Armors had glows that could shift color based on the equipped Shader, it stands to reason that would have at least some impact on the sale of their Eververse counterparts. As such I just don’t foresee this ever being changed to address your concern. (΄◉◞౪◟◉｀)