As stated in the title, Glyph of Soul Rot doesn’t change the appearance of Soul Rot to the Night Fae aesthetic - only the sound changes.
I have used the Glyph, the sound of the spell is adjusted correctly, but the visuals aren’t correct.
Can’t add a video link, but there’s a reddit Post titled “BUG: 10.2.6 Warlock Glyph for Soul Rot bugged: new sound, yet old visuals.” that shows what I mean.