I have never played Vicky 2 or CK2 so I assure you that I wouldn't even know what to change to make it so.
I'd first turn Stellaris into a thematic SMAC in Space than a anything else.
Things I wanna do: >Make any option you pick change the way you play much more drastically. >Make traits more different from one another/game-changing. Also should affect ethics. >Separate all organic species in a similar way to how Synthetic portraits and Organic portraits are similar to steamcommunity.com/sharedfiles/filedetails/?id=1160316076 >Basically, All organics would have certain traits in common, but Plantoids would have specialized traits different from mammals, and so on. >Add more ethics to the game and give each a Policy specialization, Tradition Tree, and Ascension Path. >For example, Authoritarians would now have a Police State policy that reduces unrest and gives more ethics attraction at the expense of reducing productivity. Later on you can expand on your Tradition tree to gain new bonuses and Civics to change your empire, eventually giving you the Thought Control Society Ascension Perk that basically destroys Ethic Divergence and probably has some drawback (gotta think of stuff). >meanwhile the previous Caste System policy that Authoritarians have would be given to a new Elitists Ethics, with it's own Tradition tree Ascension perk and so on. >Make MegaStructures harder to build but much more valuable. >Retool all of the Opinions Empires ahve with each other so they reflect more appropiately all of the actions they take with each other, reflecting on their government and stuff like that (Xenophobes only cares about purges of their main species types while Xenophiles react badly to even Non-sapient purges). >Make the AI less dumb if possible.
i forgot to turn it off ive been in Veeky Forums for years now and i've only now discovered you can casually name youself. i thought you needed a trip or something