#1 Ponds or streams (having the ability to place a palisade over a stream)
#2 More types of fish for the rivers/lakes/ponds (bluegill, bass, catfish, carp

#3 The ability to use frogs as bait (maybe it can increase the chance of catching pike, eel, sturgeon, and salmon)
#4 More masks and clothes for characters (i want a werewolf mask

Creating streams would involve creating a new type of water that behaves differently tho, so i dunno about that.