With Patch 10.1.5 going live, Shadow Priests have received a buff to their transmog collection, Glyph of Shadow reduction on Shadowform effect has been increased significantly, making the Priest’s transmogs easier to see!
Pre-Patch 10.1.5Currently in Patch 10.1.5
This change was indeed intended.
To which I say… “Dear Blizzard. Thank you. Thank you. A thousand times, thank you. FINALLY.”
I’ve passed that along to the design team.