From my experience the villagers in Lucky Islands love to jump off the island or walk into blocks to suffocate there. I'm not sure if that's a feature to nerf them, but I'd prefer if they didn't do that.
Maybe the stack should split up when they take suffocation damage so that the lowest villager can't kill the others. I'm not sure if the pathfinding is vanilla, but it should be possible to override that and make them more afraid of the void.
Maybe the stack should split up when they take suffocation damage so that the lowest villager can't kill the others. I'm not sure if the pathfinding is vanilla, but it should be possible to override that and make them more afraid of the void.