[MAJOR SPOILERS] On Souls and the Lifestream

[Aver]

Hydaelyn does seem to have some connection to the Lifestream, it could be that the sundering and 'creation' of 14 worlds, granter her a sort of dominion over the life she 'created' in the loosest sense (recycled from the original world)
In which case, all non Echo'd life really are Hydaelyn's children, and those with the Echo are her stewards/Ascians.

It could be that a sundered Amaurotian, aka like us, are unable to create new souls, being only 1/14th of themselves, and so Hydaelyn fulfils that role via the lifestream.

For one wild theory at least.

1/7th, now! We are joined with Ardbert - I wonder if more rejoinings are on the way.