The finalized 5.0 healer changes revealed (links)

[Ilenya]

Dissipation, Temperance and Neutral Sect have the exact same wording {Increases Healing Magic Potencies by 20%}. So if SCHs Abilities aren't affected, neither are the WHM's and ASTs from their version of it. Limiting the effectiveness of their respective buffs to beefing up Cure/Physik/Benefic and Helios/Medica/Succor.
If it doesn't affect Abilities in ShB, it affects all the healers not just SCH. All 3 Healers have powerful Abilities, not just SCH.

SCH: Physick, Adloquium, Succor.
WHM: Cure, Medica, Cure II, Regen, Cure III, Medica II, Afflatus Solace, Afflatus Rapture
AST: Benefic, Helios, Benefic II, Aspected Benefic, Aspected Helios.

I see a difference in the number of affected skills there.

I decided to check something.

SCH: Lustrate, Sacred Soil, Indomitability, Excogitation, And literally everything the faerie does.
WHM: Benediction (Ha ha), Asylum, Assize, Tetragrammaton, Divine Benison (I guess? Unsure how new skill would count), Plenary Indulgence.
AST: Essential Dignity, Collective Unconscious, Celestial Opposition, Earthly Star, Celestial Intersection, Horoscope (Maybe?)

All unaffected skills.

Does Recitation work for 1 cast only or the full 15 seconds? The tooltip reads as though it works for the duration.

There is no way on Hydelaen it's be allowed for the full 15 seconds. It'd be BUSTED if that were the case.