What I see WS could become (I know a lot of this would take a lot of work)
-Campfire sounds for campfires.
-npcs such as wolves and polar bears.
-Animations for tools and weapons.
-New resources, fur from animals (for clothing), Iron ore from rocks (placed on fire to make usable)
-Clothing slots of armor and fur clothing.
-Arrows separated into 3 or 4 different types (Stone, iron, crystal, diamond with different damages) with arc added
-Sword separated into different types like arrows.
-More recipes, structures such as completed towers, reinforced walls, furniture for huts, wells made from stoneblocks.
-Solidify (arrows stop on impact) and add health to structures.
-Hammers usable to work similar to the weld gun or just props able to be placed on props.
-First person to die becomes a polar bear along with the npcs with the same abilities, the rest become wolves (Should be made very weak to attacks)
-When 3/4 dead, player animals gain 50% more health but when they die become a crow, when all player animals are crows, then survivors win (adds a point to the game)
-Perhaps a vote during each preround for the round's ruleset (Traditional with/without npcs/player animals)
-Antlion hills changed to something more realistic (Like an actual bush)
-Vines would come from chopping trees instead of berry bushes.
-Weather effects like snow.
-Add more custom maps/fix some of the broken ones.
That's just some I can think off the top of my head.