They may think he has an idol as he voluntarily switched tribes, though still an idol can only save him once. There's an option of blindsiding, which AK may want. But making him play it would make sense if they want to keep him longer, the danger is that that might make him even more active to feed off any malcontents. Though getting the numbers against AK might not be easy. Ben is a floater, Locky is ready to go after AK, Peter made one move so he might again. If all that came together it would still leave it down to Ziggy, who I feel I don't know at all.
Jacqui seemed to be seen as being in a strong position even though Henry had switched to the other tribe. Though Michelle seemed to be playing personally as much as anything as she didn't get along with her.
You could look at Asaga as all being couples now. The trio was reduced with Jacqui going, which left Kent with Odette (the older ones). Then you have arguably the power couple now according to the editing Jericho and Luke (though for some reason power couples are normally thought of as male/female). Obviously Anneliesse and Tara are together there, they occupied a middle group but could still move to the bottom. Then there's Michelle and Sarah who have been floating along through most of the season.
When the individual immunity comes up some like Henry or Luke might seem favourites but someone else could emerge or someone might not do as well as expected. It tends to be always something involving balancing and strength, I always wish there would be more variety in the challenges.
It may not have mattered in some ways how the latest twist was done, Tara and Anneliesse may have been voted by the others to switch tribes anyway.