hello raft team ,
here is some ideas;
small boats for adventuring
bow n arrow
different types of foundation wood / metal etc... with their respected armor value
different types of shark / like if one shark dies the next would be different with different attacks like tiger-shark great-wite-shark and maybe Whales that jump out of the water or maybe a small chance of a megaladon to appear
/ this one maybe later but take it into consideration character customization and different game view-thingys like 1st-person 3d-person etc... And CROUCHING lol <3 tata and farewell