Transportation of the player, be it vehicles or teleporters.

Augmented or new ways of transporting materials - belts, inserters, pipes!

Trains are great, but what if they could do even more?

New ways to deal with enemies, be it attack or defense.

New Ores and resources as well as machines.

Things related to oil and other fluids.

Related to roboports and logistic robots.

Furnaces, assembling machines, production chains.

Changes to power production and distribution.

More than just chests.

New places to build more factories.

Map generation and terrain modification.