I apologize if these cards have already been added- it's hard to keep them all straight, especially since they aren't categorized yet.
I would like to see:
Teleportation cards that cut down on energy, add another TP spot, and add more map teleports
A refining card that lowers the energy needed to grind for elements
An animal card that lets you get double guano from batterflies
A gassifier card that reduces the energy used to convert general vapours.
That;s all I can think of for now. if anyone has any other ideas, they are welcome to post them here :)