A part of me approves of the Greece/Macedon split in Civ6 simply because, while the Hellenes were certainly a martial culture, they were not rabid expansionists and making them a warmongering Alexander civ feels wrong. At the same time, as someone who is not particularly a Hellenophile, Civ6 is so drenched in Hellenes that I wouldn't mind having fewer Hellenes. My (unpopular) solution would be: let a pre-Macedonian Greek lead Greece, let an
Egyptian lead Egypt, and leave Alexander as a great general.
Though given infinite development resources, I actually take the opposite stance of nzcamel: Balkanize
all the civs. Give me Burgundy and Normandy and Brittany alongside France! Give me Bohemia, Austria, Prussia, and Bavaria! Give me Mercia, Norman England, Tudor England, and Great Britain! Give me Assyria, Babylon, Elam, Urartu, Hurria, Hittites, Phoenicia, Israel, Judah, Damascus, Palmyra, and the Philistines! But in the real world where developer resources are limited I'd rather
not Balkanize all the civs, least of all the Balkans...
We can still Balkanize the ancient Near East, though.