But would she stop complaining?
That is a good point about Magneto - he can't go because he is one of the faces of Krakoa. So by all means, send Lorna.
If we play by story rules there has to be a telepath to maintain uplink. Therefore, Jean. I'd say Emma because I'd choose Emma Frost over Jean Grey twice on Sundays, but I'm not convinced Emma could maintain an interstellar telepathic link. Jean can and did.