Currently, enemy glyphs are very underused. Its likely that you’ll see more Priest Heals, Cures and Safety Zones than enemy glyphs, and even then they’re unusable by those skills.
Enemies that do have Glyphs do not seem to have strong ones, and in many areas there are simply no enemies making use of them or they are unusable(Example: Panto speed boosts, which are instantly consumed)
Boss fight traps could easily be converted into normal glyphs which Thaumaturge/Rouges can mess around. It could even be “fun”.