Perhaps that fount of aether rising from the depths of the moon where he once was is not simply coming from his Source-side remnants, but is also slowly leaking back in from the shards with the potential for ill effects on them as the process continues.

I would really rather not go shard-hopping again just yet and prefer sort out matters in Ilsabard or one of the other continents first, though it seems exceedingly unlikely that another existential crisis isn't brewing for Etheriys in the wake of its natural order being undermined after several millenia.