Advanced game mechanics
It would be nice to enter some of the list.
1-Improved reactor / generator control. (Ingot / sec, liters / sec.) For modders, it would be easier to make different types of fuel, which depends on the energy depth of the fuel.
(Advanced reactor mechanics, where the AC power threshold is going, the internal temperature of the reactor. Either you lower the progress bar, but this is safe, or you overload it, but you have to cool it)
2-electricity is transmitted not by block, but by cable. (But to make a tick that would be transmitted and block).
4-Weather, temperature, radiation.
5-fluid (Not necessarily super advanced mechanics)
6-Officially introduce laser weapons at the expense of energy, not ammunition.
7-Advanced Ingredient System. For example, to produce a resource, you need hydrogen gas and 2 different ingots.
8-Different speeds on the planet and in space.
9-Separate assembly and disassembly. Or it is possible to make only if it is a component.
10-Trade between players. (category for money)
11-The tree of technology (you need to research what would open. Spend time and energy on this resource)
12-Construction inside the grid. If you put a wall, it takes one block all the same, and you will not put a light bulb in this block, it will occupy one more block.
13-Another fun idea with vein ore. Where you put the drill in there, and you get it until this vein is exhausted.
14-The solar system with a real star and its trajectory. But it seems it is already impossible to implement ..
15-Hunger and thirst. Tree felling and harvest =))
16-Combine a large block with a small block.
17-custom suit, modules, filters.
Eliminate the painful problem from the 3rd person. When at a certain angle you still switch to the view from the 1st.
I hope I described it quite clearly =)In general, the meaning is that it is interesting when there is more mechanics, and people can do the object themselves =)