The /blocks command is already amazing giving access to new blocks not in the inventory, but What if we could add, Farmland Nether Portal Additionally, what if we can place crops on any surface, and we can have access to pre-grown crops so bone meal isn't needed. As of right now W/E can place cauldrons with some water, pre-grown crops, etc. But they should be placed in the /blocks section.
I think that the pre-grown crops would be too laggy, but I agree with the farmland and netherportal idea.
Like Darknebula said, it'd be too laggy to place crops everywhere. To use farmland, just type in /i 60 or /i Farmland and you can place it, it doesn't need to be in the GUI. And for nether portals, building them look way nicer then just planting them, just saying