Smooth Double Step has been a block that has been in Minecraft for months apon months now, and has been establihsed as a commonly used block on Creative servers. With the removal of it to put in the Quartz block, it will mess up and possible completely ruin creations people have made using the block.
Re-Insert Smooth Double Step (43:7) back into Minecraft
Anthony Hathaway started this petition with a single signature, and now has 241 supporters. Start a petition today to change something you care about.