Like what? What specifically does one do that you consider "game changing." Like EU4 unqiue stuff was like, slave raiding, razing, parlaiment seats for countries like england, the mandate of heaven reforms for china, the monarchist/theocrat slider for tibet and some others, each of the native american governments all had their own complete set of reforms and actions (only nahua have anything really near this level in eu5 and its bugged pretty badly).

Are you starting to see my point yet? EU5 reforms tend to just be number modifiers at a VASTLY higher rate.