I would love to see keyboard shortcuts for the 3x3 crafting table slots.
Perhaps we could use the numberpad keys? 7(home) with mouse hover would be top left in the currently opened crafting gui? 9 (PGUP) would be top right on the crafting table.

Ad infinitum to 1

@sebinside created an own mod for this Called Crafting keys. Possibly this fits your needs. He is also an german youtuber so he made some videos about the technic and he said that Inventory tweeks was very helpful for him

Jkoan