My reasoning here.
With surv you can just autoclaim Surv d1 and no one will question it. Since the average save has only one neutral benign if someone else then claims a neutral benign, one will be lynched (Then the other if the first was not lying), because both claiming same thing.
The issue here is, neutral benigns being unknown is quite strong to scum roles, they can act like jesters, pretend to be exe to get a lynch, accuse their accusers of being exe, GF/framer can claim surv or amni if invested.
But none of this works with autoclaim surv, and honestly makes the game kinda dull. The goal of what I am suggesting is to give town a reason to lynch survs, as if it comes down to it they could be harmful to town.
This does kind of take away from the whole point of the role but I feel it would make it a lot more interesting in general to the game.