A few additional thoughts.
Moira does not think much of the x-men, in the respect that she thinks if they know they always lose they will be demoralised. But the sad truth of it is the x-men mainly lose but they still keep going. It's different for them than her, no matter what she tells them they are still only ever living one life unlike hers so i thought the they don't need to know cause they were break was really weak.
I also think this issue shows the choice destiny was referring to and Moira made the right choice by deciding to not let humanity ascend, which in essence would have been the death nail for the human race. The observer even noted he wasn't sure she could die during the ascenscion but if she did he wasn't sure she would reincarnate. So life 11 will only happen if they decide to change the status quo again.