Well, Perdid, its why in the 80s after they created two Jean replacements, who were both defacto Jean (Rachel and Madelyne) they decided to bring back Jean herself .  Obviously, if a character is so important you have to keep writing her in the form of her replacement, why not just admit you like the character and bring her back as herself.   Which is what happened.  This time the EIC is trying to hold out against that happening, but it will eventually happen here as well.