Volcano on Badlands

It would be better, instead of surface sulfur commonly spawning in the plains/forest biome, surface sulfur should be extremely rare to spawn in plains/forest biome. And should only be commonly found in hot areas, such as Savannahs, Deserts, and Badlands. Mojang should also make it common to find volcanoes in Badlands, and uncommon to find on Savannahs and Oceans. Then they should be very rare on other places, volcanoes however should not spawn on Deserts, Cold biomes, and Dark plains. Where as Sulfur, Copper and Iron would be more common to find in volcanoes, however they should not add volcano eruptions, it's not minecraft-friendly. But I would be happy if volcanoes were common in the nether and mojang FINALLY adding other ores on Netheracks.