Civ series has this awkward problem where all the most powerful civilizations in history get into the first release cycles, when every game is at its simplest and least spectacular. So very great empires end up either being really mediocre in game, or strong in a crude straightfoward way, while the most complex and badass power creep goes to Maori and Colombia
You know it's amazing to me how in every game US has some random collection of quirks and perks instead of some mighty bonuses establishing it as an economic superpower, just wanted to say that

Same with China, always has some weird collection of stuff instead of crushing economic powerhouse
I'd just like India which is actually a powerful faction, not mediocrity mixed with misery (hint: abandon Gandhi, pacifism and stereotypes and actually give them some imperial economic engine, on top of making them serious religious power)
I'd like France and Spain which don't somehow always end up being mediocre or terrible despite being, you know, France and Spain (similar problem as India). Honestly England is not too great either; in civ5 it was "great civ" as in "essentially has only military bonuses" and in civ6 it was an abomination of like a dozen separate bonuses which barely amounted to something acceptable.
Basically, as you can see, I want obligatory civs, which are also great superpowers, to not oscillatw between being mediocre or boring
I'd like Incan empire focused on expansionism and their very unique "central planning" economy, I'd like Korea not focused on science fixation for once and instead going for Buddhist religion or oversea commerce, and
I'd like not - Achaemenid Persia just one goddamn time, either Sasanian or Islamic, so maybe it wouldn't have the exact same unique unit, rotating two leaders, city list, flavour and expansionist focus for 50 games in a row