Detailed Idea Description
Some plant blocks/resources have a short lifespan as dropped items.
I really felt this when I needed to gather a lot of leaf blocks for a structure and noticed I was collecting fewer blocks than I should have. I simply couldn't pick them all up in time because their lifespan is only 15 seconds.
My suggestion is an instant pickup enchantment. A mined block goes directly into the inventory, rather than dropping as an item.
I think this could be a great universal enchantment for all tools.