I think that we could do with rebranding the Egyptian war coalition with another name, and adding the Egyptians - they're an Afro-Arab nation of gigantic historical importance. Perhaps their unique unit could be, early on, a chariot, which would evolve into horsemen once we get to the Caliphates and the Mamluk sultanate eras, then perhaps in AA the "Ramses II" tank? I would want a +1 range and +15% damage bonus to them, or something along those lines that makes them comparable and equal to the French and Greek units. Then, for an ability, we could use their Nile-centric society as a basis for increasing crop production by...10-20%? Also, it was a long-standing state, so a defensive boost? What about +10% tower and castle damage and health, as the Egyptians buit fortresses along their borders to secure themselves from invasion.