Agrarian English is unorthodox, but fun idea

Not always "great navy wow much water" stereotype. So I guess Khmer are not agrarian but builder? Makes sense.
well the Huns and Goths already feel a bit displaced alongside Carthage for example. Humankind could really use an era between classical and medieval.
Maybe like this:
Classical Era (800BC - 200 AD)
So here fit Etruscans, Carthage, Celts, Rome, Greece, Scythia, Armenia, Judea, Persia, Kush, Saba, Maurya, Han Dynasty, Axum, Parthia, Phoenicia, Funan etc (also still - Babylon and Assyria)
Migration Era (Dark Ages? Transition?) 200 AD - 800 AD
So here fits Christian Rome, Byzantium, Sasanid Persia, Christian Armenia, Huns, Goths (Visigoths, Ostrogoths), Franks, Bulgars, Picts, Ireland, Anglo-Saxons, Lombarda, Avars, Axum, Sarmatians, Kushans, Gupta, Tang Dynasty, Silla Korea, Chenla, Arabs, Umayyad Caliphate, Tibet etc
Feudal Era 800 AD - 1400 AD
So here belongs Charlemagne's empire (however you name it), Scotland, Castille, Leon, Aragon, Portugal, France, Flanders, England, "Vikings", Normans, HRE, Hungary, Poland, Bohemia, Bułgaria, Serbia, Kievan Rus, still Byzantium, "Moors", Georgia, Abbasids, Samanid Persia, Seljuks, Mongols, Song Dynasty, Goryeo, Khmer, Pagan, Mali, Swahilli, Vietnam; Japan only really should count from here...
...keep on mind I am not dissecting Americas, India and Africa here...
And next eras are
Exploration (1400 - 1700) with Spain, Portugal, Dutch, Austria, Poland-Lithuania, Sweden, Ottomans, Morocco, Safavid Persia, Songhai, Kongo, Mughals, Muscovy, Ming, Joseon, Siam, Burma, still Japan and France among others...
Industrial (1700 - 1900)
Modern (1900 - 2030) I'm sorry but these two are just too radically different to mash them in one
You know what, I am surprised how well "one more era between medieval and classical" ends up feeling! There really is a different feel to late antiquity (last three centuries of Rome) than to Classical era, or to very early medieval ("dark ages") than to proper high medieval (since around 10th century).
The main problem here is, then HK team would need 70 civs instead of 60 on release
Personally I'd be really fine if they went with "oh and by the way this expansion patch also splits these two eras into three and reasigns some civs" but I don't think thats going to happen.