The woman bass player is gone now. She was/is again(?) the bass player for Lez Zeppelin. The new bass player is rumored to be one of Papa's band-mates from his previous band, as are perhaps a couple of the other ghouls. Both Omega and Alpha are also missing from this current live line-up. The new keyboard player is getting torn apart by fan reviews, but the majority of feedback of the shows has been positive on the Ghost boards. The suspicion of some (and I'm part of this group) is that the full-time guys wanted a break to make their own records and do quick tours themselves before the next Ghost record is released and that whole cycle starts over again. The others have their fingers in other projects, whereas Papa only has Ghost. The theatrical play here is, when it's time for a new Papa with the next record, the old ghouls will return.
It's also worth noting, too, that the studio Ghost is not the live Ghost.
Fun stuff.