Agreeing with Malachi and Kurolegacy on this. Also
I think this ignores that Moira, glorified bg-character or not, was one of the few human-ally of our mutants. The Krakoa retcon erased this. So, to make her a relevant character, we removed a character who has been (on and off page) an integral ally to Xavier since the very start and in the first years of Xavier's mission (since Deadly Genesis retconned her into being friends/ally of Xavier before the first class). She's been ally to the Excalibur people, she's been part of the lives of Sean and Rahne. Since the retcon goes as far as before Xavier even considered to establish a school and get a first class of mutants, it cancels and ruins all of this. She might not had hundreds of pages to her, but she has been integral nonetheless to many characters in specific and the X-Men as a whole.
Going by this, should be welcome the return of, say, Candy Southern and Trish Tilby as part of Orchis just to make them relevant again?