The holy light glyph was hotfixed to 8 yards down from 20 yards which was ridiculous to begin with. The same patch that Blizz decided to end the trivial aoe healing spam they introduce a "proc a Coh" to paladins and many are riding that train.
Blizz stated glyphs were meant to be small bonuses and not game breaking but when palas reported 30+% of their healing from that glyph, thats no longer game breaking thats just breaking the game.