The spirit might not have been in the fade for long, the Temple does have a lot of very powerful Lyrium veins, a bunch of us talked about this in the Elder One thread, and we came up with Maybe the Lyrium imprinted her essence from the Ashes as well as make them heal wounds, and we do find the spirit right up some stairs on the direct other side of the tear and at the temple the ashes were located up some stairs,
Also you can see the edges of a tear directly behind the Woman in the EoT trailer.
That's all i thought i'd say.