Something I easily noticed today when I reached the part within the main story where you retrieve a cat thing from the Lifestream... Y'shtola, her eyes are very milky/white now compared with before her trip into said Lifestream. Perhaps this is a side-effect of being doused in aether for a period of time and not having a physical form?

Oh, another thing, she also happened to mention that she can now sense aether much more easily than before...