All we need is red sandstone from the red sand. it does not make any scene that red sand makes white sandstone. Also ppl are asking for hardened clay steps / slabs in all colors.
But really amazes me is that this so called "Biome Update" has more game fixes / tweaks and other unrelated addons than biomes that were added. What ever happened to the Volcano's that was mentioned back before notch stepped down from the development of minecraft.?
I imagine volcanoes have not been added because of balancing issues. They would be certainly cool, but at the same time how would they be implemented? a single lava source block on top? Then the volcano disappears as soon as that block is removed and turns into just an ugly hill. You could have multiple source blocks peppering the surface of the mountain, but then it is sealed as soon as someone dumps a bucket of water at the top. There aren't any natural structures that could so easily be rendered grotesque and/or pointless.
You could have a caldera at the top full of lava, but then you're basically asking for a lava lake at the top of a mountain, which isn't cool looking or impressive. You could also have obsidian rivers flowing out of it, or none, which is a question of how much obsidian we want sitting around on the open plains naturally spawning