Better Craftables
This list of recipes is correct as of v3.0.0. Please note that earlier versions will not have all of these recipes, or the recipes may have changed.
Mushroom Stems
A recipe for Mushrooms Stems (Mushrooms are interchangable - can use 3 red & 1 brown, for example)
"Alternate Stone" Recipes
Cobblestone, Blackstone, Cobbled Deepslate, Granite, Diorite, Andesite, Stone, Tuff and Dripstone Blocks can be used to craft a number of items including Observers, Furnaces and Stone Tools
"Alternate Stone Slab" Recipes
Almost any stone-based slab can be used in the Armor Stand (and Grindstone, as of v2.0.0) recipes
Copper for Powered Rails
Copper can be used instead of gold in the Powered Rail recipe
Cheaper Smithing Templates
Smithing Templates now cost 3 diamonds to duplicate instead of 7. Works with all templates, including the Netherite Upgrade Template.
Honey Bottles for Sticky Pistons
Replace Slimeballs with Honey Bottles in the Sticky Piston recipe
Raw Gold Block -> Gold Block
Faster than smelting 9 Raw Ores into 9 Ingots, but also gives less XP. 40 seconds in a Furnace, 20 seconds in a Blast Furnace.