Note: I've made the mistake of NOT TESTING this update before releasing it. There's a high chance this datapack will not work in your worlds... whoops!

Remembered this datapack and after some thinking, I felt like there were some changes that NEEDED to be made...

Changelog

Tweaked MOST enchantment costs. Generally they're cheaper, but a few may be a little pricier!
Reduced the ingredient costs of MOST enchants
Feather Falling 3+ no longer costs feathers
Impaling 2 no longer requires diamonds to enchant
Impaling 3 now requires diamonds to enchant
Looting no longer requires diamonds to enchant
Multishot no longer requires amethyst shards to enchant
[BUG-FIX] Projectile Projection 3 now costs the proper amount of copper
Punch requires gold instead of iron to enchant
Sharpness no longer requires diamonds to enchant
Smite now requires diamonds to enchant
Soul Speed and Frostwalker can no longer be enchanted...initially
It should still be possible to "upgrade" items possessing the above Treasure Enchants
Swift Sneak 2 and 3 is now accessible via enchanting table
Replaced Diamond requirement for Unbreaking 2 with Copper