INTERESTING TRIVIA: Jean Grey wasn’t originally announced as the 5th member of X-Factor. Alison Blaire aka Dazzler was the first choice until editorial decided at the very last minute to resurrect Jean Grey and retcon her death in the Dark Phoenix Saga (something Mr. Chris Claremont was not very happy about)! Dazzler, as we all know, went on to serve with the Outback team instead over in Uncanny X-Men.
I bet Claremont was pissed off. I remember hearing this story in Wizard or somewhere — I love Ali, but I am glad they brought Jean back.