The Herb Witches
Buy this firstBGG threads pick it first: fifth player, books and Locoweed, barely more complexity. r/boardgames calls it a must-have; won 2019 Diamond Climber. Standalone copies out of print in the US.
Needs: Just the base game
Adds: A black fifth-player kit, 12 Herb Witch cards with one-time coin powers, the Locoweed ingredient and 8 new ingredient books.
Fixes: Lets a fifth player join, gives catch-up swings through witch powers and adds ingredient-book variety.