This may have been floated by others.
But, my guess is that the current x-books are not set in 616 Marvel. This is not a question of consistency with the other comics (which Marvel really does not give a damn about).
During "House of X" and "Power of X", it was established that McTaggert was a mutant who could re-incarnate backwards, with the chance to re****** and change her life each time. She was able to use what she had learned in one life while living her next life.
In most cases, they bigger changes that she made involved some kind of disaster, which she would work to prevent on her next pass at life.
Many of the current x-books involved the character dealing with a threat that is manifesting in response to Professor X's nation building efforts. The current run(s) are likely to end with yet another disaster (and learning experience) for McTaggert. When she applies that lesson, the changes will result in the X-books being restored to 616 stasis quo.
Thoughts?