edit: I did some more research and from what I could the whole idea of "erasing existing aspects that the NEP character has" comes from the premise of "
when are they actually dead?" and thus this was created as some stupid kind of weakness for NEP in general in order to "kill them", this being a wiki made weakness instead of a verse-to-verse thing. Honestly just adding nonexistent erasure to EE would have been the better option, dozens of profiles already have that as they kill, erase or destroy nonexistent characters.
My questions don't change much, why erasing something that wasn't relevant for X existence/nonexistence would render them unable to act? How does that prevent them from doing what they were doing if they are already not existent? And what happens with characters that have all aspects? Are they dead in any and all matches? According to DT not even NEP 2 is safe from this.
Depends on the context to be quite honest
Looking at said context, though, the runes define a given thing, how it functions and whatnot (why it isn't just concept manip is beyond me, because that's quite literally what it is), if a nonexistent character without a form of info manip resist lost it, then they'd quite simply just lose the ability to interface with reality, given that the area which defined them and their ability to interact with the world is now gone, it'd be like plugging out a controller, sure you still exist and stuff but you can't actually do anything in the game.
Beyond that, I'm more surprised the cosmology nuke angle didn't come up, considering Chaos nukes reality, including all the concepts and information that defines it, at the very least argosax wouldn't be able to do anything considering I don't think I see/know any feats of him being able to act in a void lacking literally everything, Void Mundus would be more fine (once the thread goes through), considering he exhibits a similar state, but I don't think he'd be able to affect Chaos/"reality" afterwards seeing as the rune that (theoretically mind you) defines Mundus wouldn't exist anymore, and thus any theoretical effects he could have on a non-conceptual plane would simply not work, as they are tied into that rune of "Mundus", sure some (nonexistent) conceptual effects may be applicable here (depending on where runes stand in the metaphysical hiearchy), but that is a technically seperate matter, and honestly may work considering soul > concept whereas GoW has soul = concept, but I'm not certain about how that'd work, and I don't exactly care for that argument and let you choose if you want to take that route.
(I've extrapolated a decent deal here, and this sounds so psuedrotted even to me, so take this with salt)
Beyond that, I will reiterate the fact that I disagree with the runes not being some form of concept manip, but that remains me and the chance of me actually doing something about that is at the moment, slim.