According to a rarity convention established in 24w33a, items must inherit the highest rarity of all its crafting ingredients.
From the 24w33a changelog:
Any item or block which can be crafted must inherit the highest rarity of its crafting ingredients.
…any crafted item which has only Common crafting ingredients must also be Common
However, the Dried Ghast has a rarity of uncommon while both of its crafting ingredients, the Ghast Tear and the Bone Block, have a rarity of common, breaking this convention.
Steps to Reproduce:
Get a crafting table and the crafting ingredients
Place down the crafting table and open the UI
Insert the crafting ingredients into the recipe
Observe the ingredients and output
❌ Observed: Dried Ghast has uncommon rarity while its crafting ingredients have common rarity
✔ Expected: Dried Ghast would inherit the common rarity from its crafting ingredients
I think that it would be better if the Ghast Tear was uncommon.