As I said, Ellone can't change the past in the present to any degree that her present will be segnificantly changed. It is not the past but the present that is set in stone; amounting to nearly the same thing, with minor diferences.

... I'll get back to reading the rest of the FAQ now...

We should be expecting Future Esthar to come and somehow warp any logic of this discussion; prepare to argue for some part of time being set in stone, or something of the sort...