When I play cat druid on warmane for a few months I suddenly realize that something not similar with my image. Without the glyph of omen of clarify, the faerie fire cannot 100% lead to omen of clarify.
Is it designed to be removed or may be added in the future?
This glyph never existed in the original game. It was implemented in WotLK Classic.
Within the next 24 hrs we will be making an adjustment via hotfix that will cause Omen of Clarity to always trigger when Faerie Fire (Feral) is used on non-player, non-pet targets.
Blizzard has added a new glyph for Druids in Wrath of the Lich King Classic Patch 3.4.2 PTR, Glyph of Omen of Clarity. The effect will be what the previous Feral Druid Changes were, but now requires Feral Druids to Glyph it, meaning there will be some trade-off to get the effect.
[edit] I'd like to point out sth, which might not be obvious to newcomers. Warmane's Wrath realms are based on the last patch of the game from 2008 to 2010, i.e. patch 3.3.5a. You can even see it when you open the client:
Classic Wrath is 3.4x, and because of it it doesn't affect the current design (philosophy) of warmane's WotLK realms. To my knowledge, the warmane devs sometimes consider the behaviour of some mechanics present in Blizzard's Classic servers, but only when they don't have enough information on how those worked in the original game. For anything else, which they know for certain how it behaved there, they stick to it.