The first Kingmaker also had a N0 kill but it got blocked by the BG IIRC. N0 kills generally are crap tho, it's no fun and you might as well start the game with one slot less.
Far as Barry dying, if we'd had an OP specifying that the King would die if he failed to execute another player, I woulda been fine with the death but this way it's a
Ultimately it's not like the game was 100% decided by these things tho, it was still a fair game and scum needed 2-3 mis"lynches" to win which is pretty standard.