Glyphs are very underutilized which is sad because its an awesome system for allowing class/spec customization on a level no other game really has. I mean WoW already does that well, but it could be a lot better with glyphs specifically.
Glyphs also don’t have to step out of the boundary of class/spec fantasy. A good example of that is monk glyphs, they have the ability to change the color of their Crackling Jade lightning to the colors of the other celestials (red, white, etc). DKs can change the color of their Anti-Magic Shell to Red/Blue.
We need to see more of that overall. These are non disruptive ways to enhance or customize your spell visuals without detracting from spec/class fantasy or confusing other players (they will get used to it anyway). Using my class as an example:
-Glyphs to change the color of Lightning bolt to Red or White as we have red/white lightning incorporated into a lot of our sets and themes, so it’d take on a Volcanic/Wind coloration.
-Glyphs to change Lightning Shield to Magma Shield (does the exact same thing as lightning shield, just changes it to a volcanic/magma shield appearance) and Earth shield colors to take on a more volcanic appearance (red/orange) or windy appearance (whiter/grayer appearance)
-Glyphs to add elemental effects to your Ghost Wolf appearance (Lightning effects or volcanic effects or Wind effects, etc)
-Glyphs to add elemental effects to your Astral Recall (Lightning effects or Volcanic effects or Air effects etc)
Maybe an overhaul to change glyphs into a full blown collection system would be awesome, once you collect a glyph you have it permanently. Newer glyphs could maybe come from many things but namely interaction with Class Halls again would be great.