Speaking with Emet-Selch while he's an NPC you can ask about the Convocation. He reveals the duties of each Convocation member and why they were chosen, of which we only had inlings of Emet, Lahabrea, and kind of Halmarut.
Divided into those that are authorities in their field were:
- Mitron: Aquatic life
- Loghrif: Terrestrial life and husbandry
- Halmarut: fungal and plant life
- Emmerololth: Medicine and healing
- Lahabrea: Creation magicks (who has "brought forth phantom beings of the highest complexity")
Then those that "possessed skills that would facilitate the performance of their stipulated duties":
- Altima: Advicate of the Arts (interesting?)
- Igeyorhm: Champion of Enlightenment and Rethoric
- Pashtarot: Preserver of Discipline and Order
- Emet-Selch: Keeper of the Aetherial Realm,
- Fandaniel: Pursuer of Extant Phenomena
- Azem: Traveler of the World and Counselor to the People.
I believe it's the first time we know the entire Convocation's roles. What will it mean besides world-building, I don't know. But I'm very interested and hope it's not merely window-dressing, considering our missing four Ascians.