We're talking about a game whereby you can slap down 50000 dudes in Kentucky and march almost straight west to the Pacific (with a mild detour hugging mountains lol) with little more attrition than you'd see marching along the coast of India or Sweden.
There is definitely inconsistency in the representation of Africa here :/.
At least Africa has tons of agressive natives, worst thing is it is possible to discover every province in South America with 2000 men force. I actually did it and I was
16th century Iroquis back then. I mean, okay I know conquistadors travelled from Colombia to Peru but they
a) Suffered heavy losses (eventually they all died killed by diseases or fighting between themselves, of course that's different thing)
b) Weren't able to conquer Mapuche natives due to Chilean deserts (actually, Spanish lost big scale open war against Lautaro)
c) Not to even mention open pampas of Argentina and gigantic jungles occupying huge part of the continent.
As for the thread, Subsaharan Africa already gets more attention than 99% games

(Western and Eastern Africa are awesomely depicted) but it needs some adjustments.
a) Kongo Basin is, as you can see on the population map, way not enough represented. There were few more kingdoms in this area and total population of at least 1 million people, as well as few big cities (M'banza Kongo).
b) Great Lakes area also had significant population density and feudal kingdoms of Buganda, Bunyoro, Rwanda, Maravi etc.
c) Mutapa is horribly weak and horribly undetailed; there were few more political entities in this area as well as considerable pop density allowing these people on defense against Portuguese incursions. It should go at least few colonzed/uncolonized provinces deeper in the wasteland, especially on north.
d) Madagascar is ridiculous. It had feudal era since European medieval times, numerous kingdoms of various nations and trade connections with Kilwa/Indian Ocean, it was independent until 19th century and it is an island bigger than Britain yet in game it has
three provinces... There should be like 10 provinces here and at least 3-4 tags.
e) Zulu could be added though southern Africa generally was very, very sparsely populated and had almost no political history.
Afterwards, the only adjustments world map really should see:
a) Some more provinces in Europe, mainly Ireland
b) Few more provinces and tags in South East Asia which was pretty developed area, more than most of Africa; there are many useless tags in-game for SEA which activate late or never
c) Few Filipino tribes which, guess what, had kingdoms in eu4 era and before it
d) Removal of Siberian Clans... Okay maybe that's just me (though when I founded thread about that, surprisingly many people agreed) but I think they are not only ridiculous/unrealistic/undeserving but boring, pointless and without any flavor. And they can't even have any flavour because these four tribes, depicted by generous eu4 as political states on tech level of Japan, IRL had all together population of like 20 - 30 000 hunter - gatherers. Including them is ridiculous when there are no native states of Oceania (there were few actual
kingdoms here, such as Fiji Tonga or Hawaii), aforementioned Philippines and of course southern half of Africa.