I'd like to see a way to change back from previously-chosen doctrines, with a high cost for the player in question, of course.
It would be nice too see technology determined by your population demographics (and a bit of luck). Would elegantly solve the problem of tech rushing.
Perhaps the type of government should have a direct impact on the easyiness of researching certain fields.
For instance an autocratic government or dictatorship could direct research more than a democracy.
A democracy, especially with Laissez-faire economic policy is less directed but more inventive as it allows entrepreneurs to flourish and encourages free thinking.
Democracies are better at certain cultural and financial inventions but Autocracies are better at millitary and industrial research.
Even religion could play a part in inventiveness.
Perhaps the type of government should have a direct impact on the easyiness of researching certain fields.
For instance an autocratic government or dictatorship could direct research more than a democracy.
A democracy, especially with Laissez-faire economic policy is less directed but more inventive as it allows entrepreneurs to flourish and encourages free thinking.
Democracies are better at certain cultural and financial inventions but Autocracies are better at millitary and industrial research.
Even religion could play a part in inventiveness.
Either way every thing about a country and its government could contribute possitives and negatives to different areas of research which would give a more balanced game as certain countries play to their respective strengths and can trade with other countries those techs they find mutualy harder to research themselves.