I do like the nether tools upgrades (swords doing fire damage, shovels turn sand into glass, ect.)
I would like to see a new ranged weapon though, something like either a fire bow (same recipe just rods instead of sticks) or something around a crossbow, that uses the rods as ammo (or the rods as an ingredient for their arrows/bolts)
i was thinking the blueprints for the crossbow could be
something around that or make the crossbow, you have to assemble parts then put them together. you could make a wooden version and an iron version, have the iron version either shoot faster/farther or something around that
I thought of an idea similar to this but mine had a crafting recipe involving a Blaze Rod, Ender Pearl, and Ghast Tear to make a wand type object. You would then point at an area and have an explosion on the level of tnt...though the durability of the item would have to be small, like 7 uses, for it to be somewhat balanced.