Instead of having bedrock every block Y1 and randomly Y2-Y5(or Y4, don't know), could a plugin author make it so the world generation only makes bedrock at Y1? (And as well, maybe fix a bug that can be found on the "debug" seed (dig down and look for a lava pool around x-20, z-10, clear it out, and you should find 1-3 holes in the lowest bedrock level, entering the void ), which can be a simple fix, just redoing the lowest bedrock layer after lava pool generation) If this is possible, thank you if you decide to make it. If this is not possible, thank you anyways for trying.
you know,.. there is some ancient tool called "the search" but, who is using such ancient things to find desired plugins? Its much more modern to ask before search! haha seriously.. I entered "bedrock" and there it is. http://forums.bukkit.org/threads/edit-bedrock-v0-3-flatearth-bedrock-fix-450-670.8129/