As I understand the reason the exalted exist is to protect and serve aurene. But there are no exalted anywhere in our fight against kralkatorrik or jormag (except a lonely exalted in the forge). There is not a single exalted in the eye of the north looking after her. The only lore explanation I could come up with is that aurene gave them a special mission they are busy with.
Unfortunately I fear the writers forgot them instead of merging the exalted with the crystal bloom.