An expansion modmod for Bob's. Includes lots more chemistry, some weapons, enhancements for nuclear production, and various balance changes.
Large total conversion mods.
Transportation of the player, be it vehicles or teleporters.
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.
Furnaces, assembling machines, production chains.
Changes to power production and distribution.
Made from logistic, production, utility, and space science, it would be used to research genetic innovation and any other infinite alien technologies.
Another interesting idea. It may get a little janky to have 9 science packs on the alien labs, but maybe not too bad, since eventually you wouldn't need gold science packs any more.