Expand your hex territory. Loot dungeons. Complete quests. Level up every item in the game. Trade your way to victory. Get rich.
Large total conversion mods.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
New ways to deal with enemies, be it attack or defense.
Changes to enemies or entirely new enemies to deal with.
Map generation and terrain modification.
New Ores and resources as well as machines.
Furnaces, assembling machines, production chains.
More than just chests.
Would it be possible to have this, well, overhaul, but as a single new planet?
As a single planet, but using all Space Age content? Probably yes, but that's a huge amount of work which I just can't spend the time on. Someone else would have to fork Hextorio to get that done. It is a massive undertaking.
Yeah, I can imagine