(These are only POSSIBLE updates, they won't neccessarily happen)
*Temperature/Liquids simulation: Parts can have temperatures, just like players can. Part temperatures will update every 10 seconds or so. --Temperature transfers-- Slowly changes to match ambient air temperature. Slowly dissipates (you could make heat radiators). Transferred between parts. Heat generated by certain electronics, Heaters, Engines, sunlight, lightning, etc. Heat reduced by coolers (opposite of Heaters), ice, etc. Temperature harder to control in space. --Temperature effects on parts-- Can catch fire if heated more than 300 F for flammables. Can char if heated more than 250 F for flammables. Can melt if heated beyond melting point for most metals and minerals. Can be damaged if heated more than 250 F if electronic/mechanical. Can change color depending on heat (and lose painted color) for most metals and minerals. --Liquids-- Possible Liquids: Water, Lava (molten Stone, Metal, etc), Acid, Goo, Oil, etc. Liquids would be pools of liquids that cannot be dragged/painted/resized. They combine into a larger pool when they hit each other, and can be used in crafting or have effects on other parts. Collected by Container, a part that could contain liquids that touch it (replacement for FuelTank) Deleted by Sponge, a part that deletes liquids that touch it, except for dangerous liquids like Lava.
*Part: DelaySwitch, conducts power/trigger with Adjustable delay. *Part: Turbofan, part that uses Oil and acts as a jet engine. (possibly replace Rocket) *New Engine system involving DriveBricks, so the engine can be placed away from the wheels/propeller. *TimeMachine improvement where you can travel back to any point in time, even if it was in a previous server. *Advanced Jackets, such as HazmatSuit, ScubaSuit, ParachuteSuit, GravSuit, etc.