Placing from the backpack, not the hot bar.
When you build a bed, lamp, grind stone, bench... and anything else that can be placed in the world, why not make it a right-click to place the item directly from the backpack.
Designing a bathroom? Tossing down a new bed for an NPC? or how about a complete redesign of an overly ridiculous dining hall? This gets slightly annoying having access to only 16 slots let alone, clearing out all of the hot bars slots you've spent time setting up and getting used to.