this thread, however, is made to talk about two things: what ideas come up when discussing a possible 'role' for dead players? do we even WANT to 'nerf' death in that dead people actually still affect the game?
I'll start with the second question first. The main reason to kill someone is to remove them from the game, usually to cripple the other faction. That's why mafia prioritises killing the leader and power roles. All that's pretty obvious and I personally think it should be kept that way for the most part. However I have no objection to trying it in experimental games, although I think it would work better in bigger games because each player is less important.
In terms of what we want to have these roles do: depends on the game of course, although balancing these would be very difficult. Considering that in each game there is usually only one res ability (whether rogue, resurrector, etc) it doesn't have that great an impact. But if everyone has a death role then that would change things alot.