I wouldn’t be surprised if fire is released as a kill effect.
Grunt Birthday Party would be a great kill effect that better be added. I don’t see how that is more humiliating and degrading.
It seems to me that the majority of visual things in this game are already “forced” upon you. It is a video game after all. Even things like speed lines, which are supposed to be optional, are bugged making them also “forced” upon you. So you’re already at the bottom of that slippery slope. Plus, I don’t think you have to worry about kill effects getting more humiliating and degrading since they don’t even want blood in the game.