How about:
Espionage of monthly trade on the galactic market of other empires
Espionage on factions in other empires (maybe ability to influence those factions)

引用自 Solfjes：

How about:
Espionage of monthly trade on the galactic market of other empires
Espionage on factions in other empires (maybe ability to influence those factions)

I REALLY wanted to mod this in since 2.2 but it doesn't seem possible to get data of monthly market trades as of now.

I think I could at least get information on factions but at its current state, factions as a mechanic is pretty bland to me. Hoping that Paradox's future goals involve fleshing out factions more though and I'm very curious about institutions and religions/cults.

Would it be possible for the player to start an espionage action against an empire via an edict.
IE:
The player chooses the target nation.
A timed special project is generated on a player owned system bordering the target nation.
The player researches the special project.
An event screen opens up allowing a player to choose their desired action.

This would be a lot more efficient than sending a science ship into orbit of your capital.
It would also allow for more precise targeting of the desired nation.
I have occasionally started an espionage action against my ally instead of the target nation, requiring me to return my scientist back to my capital, and back to the espionage site.

Ok now I feel stupid for posting thiis, having read the update logs.

How about missions to derail relationships between other empires?
Something along the lines of "Those guys just called you a chump!"

The Diplomatic Envoy mission does that but it's currently disabled because I want to experiment with it. It will be re-added at some point.

State sponsored pirate events or causing piracy to escalate on trade routes. Sabotaging another empire and making the blame for it fall upon another empire. Inciting rebellions. biological sabotage-food shortage, a plague.Terrorism.