I agree that tomes would be a good idea for a future spec (be it for guardian, or for any other prof where a scholary theme might fit).
I love both elite changes.
Signet of Courage is very appealing to support guardians, being kind of like an elite version of Healing Signet. Guardians deserve something like that as much, if not more, than Warriors, and being PBAoE is perfectly fitting and distinct from HS.
“Feel My Wrath” will be the default pve dps pick, while the current meditation elite should still be the best at filling the self-survival role. They are all simple to understand, and immediately appealing.
I don’t have much more to say, but perhaps I could make the following question: do quickness and fury fit the guardian’s theme? Wouldn’t this kind of effect make more sense to more aggressive professions like warrior, ranger or revenant? Perhaps there might be some kind of theme overlapping here? But it’s a very exciting effect nonetheless, and I’d rather have it over something sucky.