With legion the glyph-sytem will be fully revised. Minor glyphs with cosmetic changes only will become tomes.The glyphs were already changed, a few were added over time and old ones were removed. With legion the glyph–tab will be removed!
Major glyphs will be learned by right click and saved, their effect will be shown by hovering over the appropriate skill. Minor glyphs with cosmetic changes will not be deleted but will be dropping (tomes) just like it was years ago with higher ranks of arcane intellect f.e.
Things like Confession, Treant Form, Illusion likely learned from tomes. Angels likely triggered by a certain spell. https://t.co/z6Tpp2z7Ld
— WarcraftDevs (@WarcraftDevs) 11. Dezember 2015