Had Blizzard takes the time to explain Elune, the wisps, and how she is tied to the Winter Queen it won't be that bad, but I have little faith they will do that. Rather do it correctly.
I'm guessing Elune is a goddess of life, where the Winter Queen is of Death. Being sisters this is how Ardenweld is tied to renewal back into the mortal plain and because of this tie Night Elves become wisps rather than going to Shadowlands.
So Elune isn't part of the realm of Death so doesn't know what is going on there. It's not great but it at least can make sense if they explain it right.