If Emet-Selch somehow was ultimately successful and completed all rejoinings, wouldn't any Garleans that survived all the calamities be first in line for sacrifice to restore the ancients? Given that after all of the rejoinings that have already occurred that a trademark of the race is still that they have 0 capacity for manipulating aether, I reason that they are one of the post-sundering "creatures" and have no shattered ancient souls that would reforge like the WoL's.

I have to say, that is a pretty great joke to play on the Garleans if you are Emet-Selch. Line them up as fodder to ready the world for each rejoining(at least in the scope of the story since 1.0), then toss them on a pyre to sacrifice to Zodiark to bring back his real pals.

If that is Ascian humor, I respect it.