I Salute You, Corporal

The fifth of the ten mods every pack on 1.12 should install, no questions asked.

Making furni (the fancy-pants plural of 'furnace') and brewing faster saves your valuable time.
Crafting slabs and stairs back into their constituent blocks saves your destructive frustration.
Adding 2x2 recipes for stairs makes mineshaft stairway crafting stress-free.
Boats no longer throwing a fit when you row upstream makes waterways navigable in both directions.

The kind of mod where you won't notice it's there, but you WILL notice its absence.