Here is a list of stuff that could possibly get added in future updates (this is not written by a person with expert game design experience, so take it with a pinch of salt)
Ability to chop down trees.
You can chop down trees (possibly using a new tool, I.e crude axe) to get tree seeds (which grow in the greenhouse and when maturity is reached, continually grow fruit at a similar time to wild fruit trees, if chopped down, they would also give you wood, a combustable fuel used in...
Does what you think, burns combustables to produce power (although not biofuel, which would produce less power than the burner generator), such as wood or
Occasionally found in new coal nodes or in giant rocks, possibly used in crafting.
This furnace takes the recipe of the original smelter (which gets renamed to electric smelter and its recipe is changed to 3 metal sheets and 2 metal bars)
And can only craft metal sheets and metal bars, and uses the same combustables as the combustion generator.
You can upgrade your buggy with one front, and one back upgrade (vehicle upgrades are crafted at the garage and must be manually placed on the buggy of your choosing, they can not be removed)
Possible front upgrades: Drill, automatically digs at rocks in front of the buggy. Plating: less damage is done to the buggy when it hits a rock.
Possible back upgrades: Comms upgrade: shows the same buggy icon as the one on the minimap on the comms circle (I don't know what it is actually called it is just the circle where the diamond shape for the comms tower is displayed) However, it has less range than the normal comms tower. Cargo upgrade: adds a trunk space of one outside cargo container to your buggy.
Tank: fires explosive shells (that must be crafted by the player) that can blow up rocks from a distance, has more health, moves a lot slower
Underground reservoirs and piping
Underground water and Oil reservoirs will rarely appear on the map, and require a pump, which requires electricity to pump out the goods, which will be stored in a small tank contained in the pump (which functions the same way as a water reservoir
The liquids can then be transferred automatically to liquid holders via pipes ( which can only carry one type of liquid at a time) Pipes can be crafted into pipes with valves which function similarly to power switches, as they block any flow of liquid past said pipe
New liquid containers
New oil and petroleum containers are added to hold their respective liquids, as well as larger outside variants that hold more, are twice the hight, and become translucent when you walk behind them to give you visibility
Torefine oil, all you have to do is craft a new oil refinery, and manually or automatically (via pipes) place in oil and remove petroleum, the machine uses a lot of power however.
Then you can use the petroleum in a petroleum generator to produce large amounts of power
The crude shovel digs a lot slower, however, you can eventually craft a regular shovel with metal plated and a beam to mine ores at a faster speed
Automatic crafting bench
To use the regular crafting bench. you must be in the crafting menu to craft items, however, you can upgrade it to an automatic crafting bench using electronics, which functions the same way as today's crafting bench
Your suit can be upgraded at a upgrade station to do make quality of life better, such as more oxygen suit power, a larger light, minimap loading faster (it takes a couple extra seconds to load without it).
You can not see your base statistics until you have built this module, power is now also included in the statistics, along with oil and petroleum.
RTGs get a full rehaul, instead of constantly producing power, they no longer require nuclear fuel to craft, but rather produce huge amounts of power when fueled by nuclear fuel, big rocks occasionally drop ore and coal, scrap metal nodes can also yield metal plates and bars, scrap metal as a item can be smelted in the electric smelter, as another recipe for metal plates, which can be selected by clicking on arrows to change crafting recipes (example, metal plates can wither be crafted with 1 ore, or 2 metal scrap). Rare radioactive ore nodes can be found on the mewn. The mewn has a limited size, and loops around like a regular planet would. Sit power now drains over time, and reduction can be reduced manually shutting off your HUDs. New portable batteries can be charged at your base, which are renewable, along with oxygen tanks, but they must be recharged or refilled at a refilling station, which takes power and oxygen directly from your base.