I'd really, really prefer it if Paradox didn't slap a DLC pricetag on basic things like espionage, trade, pop managment and whatnot and instead saved it for new race packs or actual expansions. That being said, I'd like to see
- reworked vassals (
https://forum.paradoxplaza.com/forum/index.php?threads/making-vassals-useful.922409/)
- different layout for races, the window thing kind of gets under my skin
- more sector autonomy that's toggleable, like sector colonization within the systems added (so the sector doesn't expand itself)
- piracy to be dependant on sector/non-sector presence of ships/outposts/military stations
- sector patrol fleets meant to combat pirates, space boogiemonsters and such to be able to be controlled by the player via toggle
- planetary distance from the homeworld, the farther away your basic pops (your race) are from the homeworld, the less happy they are (with certain ethos?) since they're a "backwater world"
- same goes for conquered races, who want to be closer to their original homeworld, also to lengthen the period of them wanting independence, something akin to X times lifespan of race (let's say 2 generations)