You should add a Day and night Cycle
A Fish net should be cool (Who could be crafted like the item net)
Trap against the sharks (Who could be crafted with some Scraps and rope)The posibility to reinforced the foundation with the Scraps to more protect you against the shark
The possibility to do a armor with some scraps and thatch
A Sail Boat to explore the Ocean (Who can be crafted with planks and leaves)
Add some islands and on the island we can pick some Berries and explore some lost civilisations in the island and more type of tree like banana tree and who can get banana sapling Apple tree and Apple sapling
Nerf the coconuts cause the coconuts give too much Water and Food so you don't need to drink with tin can or balance the potato or the Fish
Add some bugs and birds
The posibility to stack the pillars to make skybase more easyAdd doors
Sorry for the English we are French.