This place is for any factual questions on the X-Titles or their characters. You want to know who the mystery person in some issue was or how a certain storyline ended - ask here.
Yes, my read of the Handbooks' final page was a general confirmation of membership EVER, not reflecting Krakoa's current population. Every former mutant member is probably alive and probably on Krakoa, but this Handbook does not, per se, confirm they are.
"If you want to tell people the truth, make them laugh, otherwise they'll kill you." -- Oscar Wilde