I think the reliquary guy is supposed to just be the Highest ranking member on Zandalar. Not the entire organisation.
Anyway, the Void Elves are insane. Their reasoning for joining the Alliance makes no sense and their hopes of reunification are delusional considering their mere presence is a threat to every Elf in Quel'thalas.
I hope Blizzard does more to show the Blood Elves’ loyalty to the Horde. I want to see the look on Alleria and Umbric’s face when their ‘crack squad’ is faced with an army of patriotic Blood Elves charging them down and chanting ‘For the Horde!’.