Here's some suggestions/what i would like:
- Multiplayer coop and pvp(multiple enemy rafts)
-More enemies (Pirates & fauna[with differents resource drops])
-More weapons (bows, crossbows, cannons [see pirates], harpoons, throwable knives&spears)
-Underwater exploration
-Sailing (move raft) and boats
-Spawning mini-islands (and eventual map and/or compass/stars for orientate)
-Need to light fire in order to use torches and cook.
-Birds (hunt, catch&breed for eggs and meat)
-Status effects (cold, sunburn, injuried, bleeding, etc..)
-Advanced cooking, sleep and medicine/healing (see status effects)
-More base resource like clay, bamboo, leather, glass, coral, rocks, fuel and/or biofuel (see need to light fire)
-More intermediate crafting like planks, pipes, cloth, brick, etc..
-Specific crafting benches for advanced crafting (crafing bench, foundry or furnace for smelt scrap, flyer for cloathing, etc..)
-More and upgradable structures (rain collector, shark-cage & oxygen-tank/bubble [see underwater exploration], sails [see move raft/boat], wind turbine for some kind of simple machinary or sailing [maybe?])
-Wheather and effects (rain, storm, strong wind, hurricanes)
-Easy, Hard, and Extreme difficulties
-Challenges & Achievements