I have been playing this game for a couple hours and thought of these suggestions:
1). Using shift + click to quickly move objects from inventory to chests and hot bar to inventory. After playing a long time the click and dragging is very time consuming and a tad annoying
2). More buildable objects! I love the game as is, but more buildable objects would be fantastic such as a bed that could be used to turn the night cycle to day, something to do with energy (craft wind mills), more intricate cooking - recipes and more food options would be fun because right now it is super easy to keep up the food and water meter, so being able to keep it up creativley would be awesome!
3). Underwater scavaing would be fun instead of waiting for it to happen by/ cutting down trees
On a side night, I personally would rather have updates to the game than have the developers focus on creating multiplayer.