Oh no. I've been looking forward to the isolated POVs coming back to form groups again, because of how things got less exciting with everyone splayed out all over the globe. Though now that you bring up this means of detecting characters' deaths with a literary geiger counter, I don't know if I want the books to get more "interesting." It seems like the loophole would be if a castle burns down with a POV inside it or something like that, where there'd be no use for continuing the story from that location. Then you could see an isolated POV die at any time without a buddy POV needing to show up to take over the broadcast.
The ideas "only set of eyes for a necessary, continuing plot = survival" and "multiple POVs converge = death" might actually help us predict TWOW deaths better. It's not helpful because characters move around, and it's hard to tell whose perspective is essential and whose isn't. Also, sometimes POVs do "coexist" without either of them dying because both their perspectives are needed, however temporarily (Tyrion and Sansa "coexist" as KL POVs in ACOK and for part of ASOS). So let's look at POV locations and try this idea on for size:
Bran: isolated, safe (for now)
Arya: isolated, safe (for now)
Sansa: isolated, safe (for now)
Davos: isolated, safe (for now)
Jon (I think GRRM has said Melisandre won't have any more POVs): isolated, "safe"...could change if he winds up in Asha/Theon's vicinity, but we all know Jon is plot armoured out the wazoo
Dany: isolated, safe (for now), but also plot armoured, so if she winds up converging on other POVs' location, she won't be the one to bite it
Tyrion/Barristan/Victarion: in same location, in big trouble (although because of Tyrion's plot armour, only Barristan and Victarion are in danger)
Cersei: needed KL POV, safe (for now)
Asha/Theon: in same location, in big trouble
Jaime/Brienne: in same location, in big trouble
JonCon: OK for now, that will change in Westeros where the odds of tangling with another POV go up
Also look at past POV deaths in "convergences":
Ned/Arya/Sansa: Ned dies, Arya lives but flees KL, Sansa stays in KL
Cat/Arya: Cat dies, Arya survives
Arys/Arianne: Arys dies, Arianne survives
Quentyn/Dany/Barristan: Quentyn dies, Barristan survives, Dany leaves
A past convergence where no one died as a result was Tyrion/Sansa/Davos, but the difference I think is that that "convergence" happened fairly early on in the books, while in TWOW GRRM will be trying to pare down his story to essentials and eliminate superfluous POVs.
Edited by Newstar, 05 December 2013 - 12:12 AM.