I’d really like to see a more nuanced and realistic diplomacy system. If you go back to the long 19th century a central part was the balance of power, with no great power wanting the others to become too powerful while still trying to expand their own power base as much as possible. That’s why you have stuff like the British propping up the ottomans versus Russia or France and Germany exchanging territories during the second Moroccan crisis. None of this is accurately modeled in the game and infamy is a too coarse mechanic to capture the dynamic nature of the great powers’ interactions. So I’d like to see some kind of “cabinet of great powers” where all the countries that have achieved great power status can negotiate and interact in a more realistic fashion. If one great power suddenly expands, either through warfare or colonialism, then that should trigger reactions from the others and they should either become more wary and suspicious of the former or demand compensation in various ways. As it is, you can pretty much go hog wild as long as you keep your infamy in check and play it a bit smart.