The problem with EU4 is several elements are neither historical nor balanced
For example governments, from both a historical and a balance perspective lategame governments should be more powerful than earlygame governments
Yet, if we leave revolutionary governments aside, for some reason horde government is clearly the best, 2nd place? Tribal Despotism (coring cost reduction). Best regular monarchy? Despotic monarchy (no later monarchy has bonuses that beat -unrest and -unjustified demands). In the new patch they are buffing tribal federation, iqta and adding the mamluk government - all early game governments that are now more useful than most lategame governments
I think that hordes and tribals should get better cbs, but inevitably crash if they don't reform. Bonuses on later governments should be clearly better than earlier ones. Unique governments should be different, not better, than regular ones
That is the stuff that really annoys me. If they go historical fine, if they go for balance, also fine. If they do random stuff for the "cool factor", not good
Same thing with the national ideas, why does a nation like the Rassids in the new patch get Prussia tier ideas, they left no leaving mark on world history. Yet Britain has embargo efficieny, sailor maintenaince and so on.