She has the same problem now as any character that is elevated so high on the powerscale. Malfurion, Thrall (less so after the whole super weird doomhammer thing) as well as all of the aspects for the most part.
They all have the superman syndrome where they are so powerful that they essentially take the stakes out of everything when they are involved cause they are “unbeatable” by normal standarts… So the only option is to either write them out in a way or just ignore them for now for the sake of what is happening.
As for what she is, my assumption is some sort of avatar (in the original sense of the word) a manifestation of a divine/godlike beings power. Think Avatar of Sargeras as an example.