I have finally organized my suggestions. Prepare for a long and ambitious list.
SCENARIOS (ALL):
-How about making additional historical victories for those who start at the beginning in the 1700 AD scenario? The only reason one would play as the Spaniards is to wait for the spawn of Mexico and Colombia. Speaking of which, shouldn’t they have their own option in the starting menu along with Iran? If Italy and Byzantium can, why can’t them?
-Something interesting would be adding rivers or water rings to create inland “islands” for some cities like Tenochtitlan, Venice, Singapore, Hong Kong (if such thing ever exists in-game) and Zanzibar.
-Couldn’t we add a couple of islands in the western Mediterranean Sea, like Corsica and Palma?
-I would make my suggestion about Khmer and Thailand but that would be the third time already.
-How about encouraging the Maya to settle Yucatan peninsula? And also making the Chichen Itzá spot more productive.
-Some cities should appear to represent Zimbabwe, the Boers, the Zulus, and northern Native Americans.
SCENARIOS (1700 AD):
-Adding Venice and Cagliari in the 1700 AD scenario.
-The city of Guatemala is not in Guatemala, but in Nicaragua. A more accurate location for Ciudad de Guatemala would be one or two tiles south of Tikal.
SCENARIOS (600 & 1700 AD):
-Nobody ever settles in Crete or Sardinia. Wouldn’t it be a bad idea if we add cities there before the Greek and Italian (re)spawns?
-In the 600 AD and 1700 AD scenarios, besides Mecca and Patna, why not add another sacred city from their respective regions? Madinah and Varanasi, obviously.
-Shouldn’t there be the Teracotta Army in Xian, Great Cotton in Tunis, Khajuraho in Delhi or central India, the Hanging Gardens and the Ishtar Gate in Baghdad, and some Greek (Colossus, Mausoleum, Temple of Artemisa) wonders in western Turkey, Constantinople and Crete? Maybe the strength of those civilizations and their neighbors should be changed in order to balance.
-How about the Ethiopians starting in both scenarios? Maybe giving them an UHV for both scenarios, or at least giving them more cities.
WONDERS:
-I request returning these national wonders: Heroic Epic, National Epic, National University (Oxford University), West Point Academy.
-Along with these world wonders: Moai Statues (even if they must have a different function) and Stonehenge (somehow, it must manage to be that old while having a civ to build it, like a city in England founding it or it spawning with the English).
-The UN was created after the end of WW2. In order to translate this into the game, all the wars in the world automatically being stopped could be an interesting addition.
-More civilizations could have a Trading Company effect. For example, America (Hawaii, Alaska, and the Philippines), Germany (Africa, New Guinea), Japan (Korea).
CIVILIZATIONS:
-Shouldn’t Egypt spawn in Memphis rather than in Thebes? Thebes was the most important capital of the Middle and New kingdoms, but Memphis is closer to the location of the Pyramids and the Sphinx.
-How about, rather than changing capitals, an additional capitol is added when certain human or AI civilizations meet certain conditions? For example, Japan’s capitol added in Tokyo starting the Industrial Era, Iran’s in Tabriz or Tehran in the Modern Era, Egypt in Thebes during Classical. etc.
-For some reason, in my games the English are always very advanced.
-Speaking of the English, they should change their name to British somewhere in the game. The same way, the Moors should change their name to Morocco. I mean in the way Holy Rome is changed to Austria and Prussia is changed to Germany.
-The Scottish could be added, either as a civ, or as one or two independent cities.
-The Arabs and Mughals should not only spread their religions upon conquering cities, but also upon founding them. The same thing that the Arabs have should happen with the Spaniards.
-Brazil starting a war with Portugal upon flipping its cities is very historically inaccurate. Those cities should flip 100% peacefully.
-If there is space for more civ, there could be Canada, Australia (I know there are addons for that, but just for a future version), South Africa, and Denmark-Norway being separated from Sweden.
RELIGION:
-I have no idea why Judaism was removed. Maybe it was considered not historically relevant enough. I have no complaints, but I would be okay as long as it does not replace Christianity or Paganism in the early game. If it is added, some cities should start with it in the 600 AD and 1700 AD scenarios, like New York, Amsterdam, Hamburg, Poland, and Ukraine.
-Maybe Shintoism should be added, with it spawning with Japan. However, this would have to either reduce Tibet’s UHV requirements (25% is not so challenging, but anything between 25 and 30 is not a round number), or getting Japan’s spawn back to the 7th century BC, or having an independent Kyoto in that date centuries before the Japanese spawn.
-When immigrating to the United States, what if the immigrants spread their religion as well? That would be interesting, and a slightly more accurate depiction of the American Dream. Not the same case in Latin America, unless it is Protestantism and in the late game.
-Isn’t the Apostolic Palace boring? Besides, becoming obsolete with Nationalism is too soon. Back to Mass Media would be a better idea… and also adding mechanics, like removing non-state religions somewhere. Or crusade events causing an army from the ones to voted yes (or the Pope civilization, at least) to appear near certain key cities.
-Could they please make it possible to have many persecutions be built at a time?
-The same way Christianity is removed from Anatolia after Byzantium’s collapse, Islam should be removed from southern and eastern India after Mughal collapses, and Hinduism from Indochina after Khmer collapses.
CORPORATIONS:
-Apparently, the number of religions should be the same as corporations, so here is some brainstorming about it: Fast food, chocolate or candy, toys, the Hanseatic League, airlines, entertainment (movies, music or TV).
UNITS:
-I am aware that the unit rooster is being changed, but what I don’t know for sure is if Cavalry will get an upgrade before Helicopters, or if the gap between those two will be filled.
-The Mughal Siege Elephant should be able to cross Jungles. It is an elephant unit after all, and like them, it should have a bonus vs mounted units.
-Somebody made an add on so there are two uniques per civ. Why not incorporate that officially in a future version?
DYNAMIC NAMES:
-Japan, when having a Republic system, is called “Republic of Japan”. “State of Japan” would make more sense, compared with real life. It may be a monarchy but in practice it is more like a crowned republic. Also, it should have its Shogunate name back, maybe during the Medieval and Renaissance Eras.
-The Commonwealth of England was a short lived republic in the 17th century. Since the Industrial or Modern Era it should have the name of United Kingdom of Great Britain and (Northern) Ireland. (…of all these suggestions, this is the one that is the least worth listening to, I guess).
-The Autocracy civic sometimes is republican or monarchical, depending on the civ and the civics it is mixed with. It should give the name “French Empire” to the French, and historically depending on the civ, when mixing it with Representation or Egalitarianism, it should give either a monarchical name (Europe, Asia, Saharan Africa) or a republican one (The Americas, Sub Saharan Africa, Indonesia).